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Finding the Fourth Proportional to 87,218.60, 130,828.40 and 31,060.90

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Solution

The fourth proportional to 87,218.60, 130,828.40 and 31,060.90 is: 46,591.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,218.60 : 130,828.40 = 31,060.90 : x
  2. Step 2: Convert to fraction form
    87,218.60/130,828.40 = 31,060.90/x
  3. Step 3: Cross multiply
    87,218.60x = 130,828.40 × 31,060.90
  4. Step 4: Simplify right side
    87,218.60x = 4,063,647,849.56
  5. Step 5: Solve for x
    x = 4,063,647,849.56/87,218.60
  6. Step 6: Final answer
    x = 46,591.53

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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.