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Finding the Fourth Proportional to 71,892.52, 107,740.36 and 45,615.72

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Solution

The fourth proportional to 71,892.52, 107,740.36 and 45,615.72 is: 68,361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,892.52 : 107,740.36 = 45,615.72 : x
  2. Step 2: Convert to fraction form
    71,892.52/107,740.36 = 45,615.72/x
  3. Step 3: Cross multiply
    71,892.52x = 107,740.36 × 45,615.72
  4. Step 4: Simplify right side
    71,892.52x = 4,914,654,094.46
  5. Step 5: Solve for x
    x = 4,914,654,094.46/71,892.52
  6. Step 6: Final answer
    x = 68,361.13

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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.