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Finding the Fourth Proportional to 71,958.60, 99,330.20 and 54,105.44

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Solution

The fourth proportional to 71,958.60, 99,330.20 and 54,105.44 is: 74,686.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,958.60 : 99,330.20 = 54,105.44 : x
  2. Step 2: Convert to fraction form
    71,958.60/99,330.20 = 54,105.44/x
  3. Step 3: Cross multiply
    71,958.60x = 99,330.20 × 54,105.44
  4. Step 4: Simplify right side
    71,958.60x = 5,374,304,176.29
  5. Step 5: Solve for x
    x = 5,374,304,176.29/71,958.60
  6. Step 6: Final answer
    x = 74,686.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.