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Finding the Fourth Proportional to 87,187.92, 130,843.98 and 39,809.40

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Solution

The fourth proportional to 87,187.92, 130,843.98 and 39,809.40 is: 59,742.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,187.92 : 130,843.98 = 39,809.40 : x
  2. Step 2: Convert to fraction form
    87,187.92/130,843.98 = 39,809.40/x
  3. Step 3: Cross multiply
    87,187.92x = 130,843.98 × 39,809.40
  4. Step 4: Simplify right side
    87,187.92x = 5,208,820,337.41
  5. Step 5: Solve for x
    x = 5,208,820,337.41/87,187.92
  6. Step 6: Final answer
    x = 59,742.45

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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.