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Finding the Fourth Proportional to 71,686.72, 107,215.68 and 63,844.56

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Solution

The fourth proportional to 71,686.72, 107,215.68 and 63,844.56 is: 95,486.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,686.72 : 107,215.68 = 63,844.56 : x
  2. Step 2: Convert to fraction form
    71,686.72/107,215.68 = 63,844.56/x
  3. Step 3: Cross multiply
    71,686.72x = 107,215.68 × 63,844.56
  4. Step 4: Simplify right side
    71,686.72x = 6,845,137,914.70
  5. Step 5: Solve for x
    x = 6,845,137,914.70/71,686.72
  6. Step 6: Final answer
    x = 95,486.83

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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.