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Finding the Fourth Proportional to 123,403.86, 185,123.86 and 39,135.90

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Solution

The fourth proportional to 123,403.86, 185,123.86 and 39,135.90 is: 58,709.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,403.86 : 185,123.86 = 39,135.90 : x
  2. Step 2: Convert to fraction form
    123,403.86/185,123.86 = 39,135.90/x
  3. Step 3: Cross multiply
    123,403.86x = 185,123.86 × 39,135.90
  4. Step 4: Simplify right side
    123,403.86x = 7,244,988,872.57
  5. Step 5: Solve for x
    x = 7,244,988,872.57/123,403.86
  6. Step 6: Final answer
    x = 58,709.58

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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.