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Finding the Fourth Proportional to 113,715, 156,926.70 and 63,412.92

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Solution

The fourth proportional to 113,715, 156,926.70 and 63,412.92 is: 87,509.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,715 : 156,926.70 = 63,412.92 : x
  2. Step 2: Convert to fraction form
    113,715/156,926.70 = 63,412.92/x
  3. Step 3: Cross multiply
    113,715x = 156,926.70 × 63,412.92
  4. Step 4: Simplify right side
    113,715x = 9,951,180,272.96
  5. Step 5: Solve for x
    x = 9,951,180,272.96/113,715
  6. Step 6: Final answer
    x = 87,509.83

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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.