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Finding the Fourth Proportional to 71,723.80, 107,585.70 and 67,058.20

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Solution

The fourth proportional to 71,723.80, 107,585.70 and 67,058.20 is: 100,587.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,723.80 : 107,585.70 = 67,058.20 : x
  2. Step 2: Convert to fraction form
    71,723.80/107,585.70 = 67,058.20/x
  3. Step 3: Cross multiply
    71,723.80x = 107,585.70 × 67,058.20
  4. Step 4: Simplify right side
    71,723.80x = 7,214,503,387.74
  5. Step 5: Solve for x
    x = 7,214,503,387.74/71,723.80
  6. Step 6: Final answer
    x = 100,587.30

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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.