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Finding the Fourth Proportional to 87,347.80, 131,021.70 and 37,419.40

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Solution

The fourth proportional to 87,347.80, 131,021.70 and 37,419.40 is: 56,129.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,347.80 : 131,021.70 = 37,419.40 : x
  2. Step 2: Convert to fraction form
    87,347.80/131,021.70 = 37,419.40/x
  3. Step 3: Cross multiply
    87,347.80x = 131,021.70 × 37,419.40
  4. Step 4: Simplify right side
    87,347.80x = 4,902,753,400.98
  5. Step 5: Solve for x
    x = 4,902,753,400.98/87,347.80
  6. Step 6: Final answer
    x = 56,129.10

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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.