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Finding the Fourth Proportional to 123,358.33, 170,235.91 and 72,371.97

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Solution

The fourth proportional to 123,358.33, 170,235.91 and 72,371.97 is: 99,874.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,358.33 : 170,235.91 = 72,371.97 : x
  2. Step 2: Convert to fraction form
    123,358.33/170,235.91 = 72,371.97/x
  3. Step 3: Cross multiply
    123,358.33x = 170,235.91 × 72,371.97
  4. Step 4: Simplify right side
    123,358.33x = 12,320,308,171.44
  5. Step 5: Solve for x
    x = 12,320,308,171.44/123,358.33
  6. Step 6: Final answer
    x = 99,874.15

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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.