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Finding the Fourth Proportional to 71,723.80, 107,585.70 and 55,167.40

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Solution

The fourth proportional to 71,723.80, 107,585.70 and 55,167.40 is: 82,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,723.80 : 107,585.70 = 55,167.40 : x
  2. Step 2: Convert to fraction form
    71,723.80/107,585.70 = 55,167.40/x
  3. Step 3: Cross multiply
    71,723.80x = 107,585.70 × 55,167.40
  4. Step 4: Simplify right side
    71,723.80x = 5,935,223,346.18
  5. Step 5: Solve for x
    x = 5,935,223,346.18/71,723.80
  6. Step 6: Final answer
    x = 82,751.10

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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.