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Finding the Fourth Proportional to 157,472.67, 217,312.97 and 100,916.85

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Solution

The fourth proportional to 157,472.67, 217,312.97 and 100,916.85 is: 139,265.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,472.67 : 217,312.97 = 100,916.85 : x
  2. Step 2: Convert to fraction form
    157,472.67/217,312.97 = 100,916.85/x
  3. Step 3: Cross multiply
    157,472.67x = 217,312.97 × 100,916.85
  4. Step 4: Simplify right side
    157,472.67x = 21,930,539,891.96
  5. Step 5: Solve for x
    x = 21,930,539,891.96/157,472.67
  6. Step 6: Final answer
    x = 139,265.69

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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.