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Finding the Fourth Proportional to 123,644.61, 185,480.55 and 39,385.17

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Solution

The fourth proportional to 123,644.61, 185,480.55 and 39,385.17 is: 59,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,644.61 : 185,480.55 = 39,385.17 : x
  2. Step 2: Convert to fraction form
    123,644.61/185,480.55 = 39,385.17/x
  3. Step 3: Cross multiply
    123,644.61x = 185,480.55 × 39,385.17
  4. Step 4: Simplify right side
    123,644.61x = 7,305,182,993.44
  5. Step 5: Solve for x
    x = 7,305,182,993.44/123,644.61
  6. Step 6: Final answer
    x = 59,082.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.