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Finding the Fourth Proportional to 123,239.90, 169,916.96 and 102,851.30

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Solution

The fourth proportional to 123,239.90, 169,916.96 and 102,851.30 is: 141,806.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,239.90 : 169,916.96 = 102,851.30 : x
  2. Step 2: Convert to fraction form
    123,239.90/169,916.96 = 102,851.30/x
  3. Step 3: Cross multiply
    123,239.90x = 169,916.96 × 102,851.30
  4. Step 4: Simplify right side
    123,239.90x = 17,476,180,909.97
  5. Step 5: Solve for x
    x = 17,476,180,909.97/123,239.90
  6. Step 6: Final answer
    x = 141,806.19

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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.