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Finding the Fourth Proportional to 71,617.20, 107,425.80 and 40,513.20

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Solution

The fourth proportional to 71,617.20, 107,425.80 and 40,513.20 is: 60,769.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,617.20 : 107,425.80 = 40,513.20 : x
  2. Step 2: Convert to fraction form
    71,617.20/107,425.80 = 40,513.20/x
  3. Step 3: Cross multiply
    71,617.20x = 107,425.80 × 40,513.20
  4. Step 4: Simplify right side
    71,617.20x = 4,352,162,920.56
  5. Step 5: Solve for x
    x = 4,352,162,920.56/71,617.20
  6. Step 6: Final answer
    x = 60,769.80

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1.5x scale

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.