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Finding the Fourth Proportional to 87,335.40, 130,916.70 and 42,925.80

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Solution

The fourth proportional to 87,335.40, 130,916.70 and 42,925.80 is: 64,346.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,335.40 : 130,916.70 = 42,925.80 : x
  2. Step 2: Convert to fraction form
    87,335.40/130,916.70 = 42,925.80/x
  3. Step 3: Cross multiply
    87,335.40x = 130,916.70 × 42,925.80
  4. Step 4: Simplify right side
    87,335.40x = 5,619,704,080.86
  5. Step 5: Solve for x
    x = 5,619,704,080.86/87,335.40
  6. Step 6: Final answer
    x = 64,346.23

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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.