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Finding the Fourth Proportional to 81,427,326,438.90, 121,968,996,979.95 and 81,427,326,438.90

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Solution

The fourth proportional to 81,427,326,438.90, 121,968,996,979.95 and 81,427,326,438.90 is: 121,968,996,979.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,427,326,438.90 : 121,968,996,979.95 = 81,427,326,438.90 : x
  2. Step 2: Convert to fraction form
    81,427,326,438.90/121,968,996,979.95 = 81,427,326,438.90/x
  3. Step 3: Cross multiply
    81,427,326,438.90x = 121,968,996,979.95 × 81,427,326,438.90
  4. Step 4: Simplify right side
    81,427,326,438.90x = 9,931,609,332,511,596,871,680
  5. Step 5: Solve for x
    x = 9,931,609,332,511,596,871,680/81,427,326,438.90
  6. Step 6: Final answer
    x = 121,968,996,979.95

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.