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Finding the Fourth Proportional to 87,207.60, 130,811.40 and 42,862.80

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Solution

The fourth proportional to 87,207.60, 130,811.40 and 42,862.80 is: 64,294.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,207.60 : 130,811.40 = 42,862.80 : x
  2. Step 2: Convert to fraction form
    87,207.60/130,811.40 = 42,862.80/x
  3. Step 3: Cross multiply
    87,207.60x = 130,811.40 × 42,862.80
  4. Step 4: Simplify right side
    87,207.60x = 5,606,942,875.92
  5. Step 5: Solve for x
    x = 5,606,942,875.92/87,207.60
  6. Step 6: Final answer
    x = 64,294.20

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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.