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Finding the Fourth Proportional to 131,575.43, 181,575.12 and 72,640.73

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Solution

The fourth proportional to 131,575.43, 181,575.12 and 72,640.73 is: 100,244.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,575.43 : 181,575.12 = 72,640.73 : x
  2. Step 2: Convert to fraction form
    131,575.43/181,575.12 = 72,640.73/x
  3. Step 3: Cross multiply
    131,575.43x = 181,575.12 × 72,640.73
  4. Step 4: Simplify right side
    131,575.43x = 13,189,749,448.17
  5. Step 5: Solve for x
    x = 13,189,749,448.17/131,575.43
  6. Step 6: Final answer
    x = 100,244.78

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1.5x scale

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.