Home / 81,551,214.80-122,326,822.20-78,415,931.60

Finding the Fourth Proportional to 81,551,214.80, 122,326,822.20 and 78,415,931.60

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Solution

The fourth proportional to 81,551,214.80, 122,326,822.20 and 78,415,931.60 is: 117,623,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,551,214.80 : 122,326,822.20 = 78,415,931.60 : x
  2. Step 2: Convert to fraction form
    81,551,214.80/122,326,822.20 = 78,415,931.60/x
  3. Step 3: Cross multiply
    81,551,214.80x = 122,326,822.20 × 78,415,931.60
  4. Step 4: Simplify right side
    81,551,214.80x = 9,592,371,722,480,562
  5. Step 5: Solve for x
    x = 9,592,371,722,480,562/81,551,214.80
  6. Step 6: Final answer
    x = 117,623,897.40

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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.