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Finding the Fourth Proportional to 87,446.80, 130,975.80 and 67,661.20

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Solution

The fourth proportional to 87,446.80, 130,975.80 and 67,661.20 is: 101,341.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,446.80 : 130,975.80 = 67,661.20 : x
  2. Step 2: Convert to fraction form
    87,446.80/130,975.80 = 67,661.20/x
  3. Step 3: Cross multiply
    87,446.80x = 130,975.80 × 67,661.20
  4. Step 4: Simplify right side
    87,446.80x = 8,861,979,798.96
  5. Step 5: Solve for x
    x = 8,861,979,798.96/87,446.80
  6. Step 6: Final answer
    x = 101,341.38

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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.