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Finding the Fourth Proportional to 157,423.71, 217,248.17 and 85,807.29

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Solution

The fourth proportional to 157,423.71, 217,248.17 and 85,807.29 is: 118,415.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,423.71 : 217,248.17 = 85,807.29 : x
  2. Step 2: Convert to fraction form
    157,423.71/217,248.17 = 85,807.29/x
  3. Step 3: Cross multiply
    157,423.71x = 217,248.17 × 85,807.29
  4. Step 4: Simplify right side
    157,423.71x = 18,641,476,296.12
  5. Step 5: Solve for x
    x = 18,641,476,296.12/157,423.71
  6. Step 6: Final answer
    x = 118,415.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.