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Finding the Fourth Proportional to 123,687, 170,620.02 and 87,930.36

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Solution

The fourth proportional to 123,687, 170,620.02 and 87,930.36 is: 121,295.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,687 : 170,620.02 = 87,930.36 : x
  2. Step 2: Convert to fraction form
    123,687/170,620.02 = 87,930.36/x
  3. Step 3: Cross multiply
    123,687x = 170,620.02 × 87,930.36
  4. Step 4: Simplify right side
    123,687x = 15,002,679,781.81
  5. Step 5: Solve for x
    x = 15,002,679,781.81/123,687
  6. Step 6: Final answer
    x = 121,295.53

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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.