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Finding the Fourth Proportional to 87,059.70, 130,589.55 and 51,981.30

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Solution

The fourth proportional to 87,059.70, 130,589.55 and 51,981.30 is: 77,971.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,059.70 : 130,589.55 = 51,981.30 : x
  2. Step 2: Convert to fraction form
    87,059.70/130,589.55 = 51,981.30/x
  3. Step 3: Cross multiply
    87,059.70x = 130,589.55 × 51,981.30
  4. Step 4: Simplify right side
    87,059.70x = 6,788,214,575.42
  5. Step 5: Solve for x
    x = 6,788,214,575.42/87,059.70
  6. Step 6: Final answer
    x = 77,971.95

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Similar ratio
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1.5x scale

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.