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Finding the Fourth Proportional to 71,814.20, 107,725.98 and 58,638.20

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Solution

The fourth proportional to 71,814.20, 107,725.98 and 58,638.20 is: 87,961.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,814.20 : 107,725.98 = 58,638.20 : x
  2. Step 2: Convert to fraction form
    71,814.20/107,725.98 = 58,638.20/x
  3. Step 3: Cross multiply
    71,814.20x = 107,725.98 × 58,638.20
  4. Step 4: Simplify right side
    71,814.20x = 6,316,857,560.44
  5. Step 5: Solve for x
    x = 6,316,857,560.44/71,814.20
  6. Step 6: Final answer
    x = 87,961.12

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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.