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Finding the Fourth Proportional to 71,688.72, 107,218.68 and 63,846.56

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Solution

The fourth proportional to 71,688.72, 107,218.68 and 63,846.56 is: 95,489.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,688.72 : 107,218.68 = 63,846.56 : x
  2. Step 2: Convert to fraction form
    71,688.72/107,218.68 = 63,846.56/x
  3. Step 3: Cross multiply
    71,688.72x = 107,218.68 × 63,846.56
  4. Step 4: Simplify right side
    71,688.72x = 6,845,543,885.74
  5. Step 5: Solve for x
    x = 6,845,543,885.74/71,688.72
  6. Step 6: Final answer
    x = 95,489.83

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1.5x scale

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.