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Finding the Fourth Proportional to 253,932.04, 381,073.34 and 87,720.04

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Solution

The fourth proportional to 253,932.04, 381,073.34 and 87,720.04 is: 131,640.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,932.04 : 381,073.34 = 87,720.04 : x
  2. Step 2: Convert to fraction form
    253,932.04/381,073.34 = 87,720.04/x
  3. Step 3: Cross multiply
    253,932.04x = 381,073.34 × 87,720.04
  4. Step 4: Simplify right side
    253,932.04x = 33,427,768,189.13
  5. Step 5: Solve for x
    x = 33,427,768,189.13/253,932.04
  6. Step 6: Final answer
    x = 131,640.61

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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.