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Finding the Fourth Proportional to 87,373.20, 130,768.20 and 61,129.20

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Solution

The fourth proportional to 87,373.20, 130,768.20 and 61,129.20 is: 91,489.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,373.20 : 130,768.20 = 61,129.20 : x
  2. Step 2: Convert to fraction form
    87,373.20/130,768.20 = 61,129.20/x
  3. Step 3: Cross multiply
    87,373.20x = 130,768.20 × 61,129.20
  4. Step 4: Simplify right side
    87,373.20x = 7,993,755,451.44
  5. Step 5: Solve for x
    x = 7,993,755,451.44/87,373.20
  6. Step 6: Final answer
    x = 91,489.79

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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.