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Finding the Fourth Proportional to 87,311.65, 130,926.01 and 39,912.68

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Solution

The fourth proportional to 87,311.65, 130,926.01 and 39,912.68 is: 59,850.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.65 : 130,926.01 = 39,912.68 : x
  2. Step 2: Convert to fraction form
    87,311.65/130,926.01 = 39,912.68/x
  3. Step 3: Cross multiply
    87,311.65x = 130,926.01 × 39,912.68
  4. Step 4: Simplify right side
    87,311.65x = 5,225,607,613.49
  5. Step 5: Solve for x
    x = 5,225,607,613.49/87,311.65
  6. Step 6: Final answer
    x = 59,850.06

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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.