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Finding the Fourth Proportional to 87,756.80, 131,440.80 and 35,139.20

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Solution

The fourth proportional to 87,756.80, 131,440.80 and 35,139.20 is: 52,630.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,756.80 : 131,440.80 = 35,139.20 : x
  2. Step 2: Convert to fraction form
    87,756.80/131,440.80 = 35,139.20/x
  3. Step 3: Cross multiply
    87,756.80x = 131,440.80 × 35,139.20
  4. Step 4: Simplify right side
    87,756.80x = 4,618,724,559.36
  5. Step 5: Solve for x
    x = 4,618,724,559.36/87,756.80
  6. Step 6: Final answer
    x = 52,630.96

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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.