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Finding the Fourth Proportional to 63,412.68, 87,429.90 and 40,711.56

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Solution

The fourth proportional to 63,412.68, 87,429.90 and 40,711.56 is: 56,130.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,412.68 : 87,429.90 = 40,711.56 : x
  2. Step 2: Convert to fraction form
    63,412.68/87,429.90 = 40,711.56/x
  3. Step 3: Cross multiply
    63,412.68x = 87,429.90 × 40,711.56
  4. Step 4: Simplify right side
    63,412.68x = 3,559,407,619.64
  5. Step 5: Solve for x
    x = 3,559,407,619.64/63,412.68
  6. Step 6: Final answer
    x = 56,130.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.