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Finding the Fourth Proportional to 85,103,428.30, 127,655,142.45 and 85,103,428.30

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Solution

The fourth proportional to 85,103,428.30, 127,655,142.45 and 85,103,428.30 is: 127,655,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,103,428.30 : 127,655,142.45 = 85,103,428.30 : x
  2. Step 2: Convert to fraction form
    85,103,428.30/127,655,142.45 = 85,103,428.30/x
  3. Step 3: Cross multiply
    85,103,428.30x = 127,655,142.45 × 85,103,428.30
  4. Step 4: Simplify right side
    85,103,428.30x = 10,863,890,262,619,862
  5. Step 5: Solve for x
    x = 10,863,890,262,619,862/85,103,428.30
  6. Step 6: Final answer
    x = 127,655,142.45

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Double scale
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Similar ratio
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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.