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Finding the Fourth Proportional to 125,231.87, 172,829.50 and 71,519.15

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Solution

The fourth proportional to 125,231.87, 172,829.50 and 71,519.15 is: 98,701.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,231.87 : 172,829.50 = 71,519.15 : x
  2. Step 2: Convert to fraction form
    125,231.87/172,829.50 = 71,519.15/x
  3. Step 3: Cross multiply
    125,231.87x = 172,829.50 × 71,519.15
  4. Step 4: Simplify right side
    125,231.87x = 12,360,619,188.20
  5. Step 5: Solve for x
    x = 12,360,619,188.20/125,231.87
  6. Step 6: Final answer
    x = 98,701.86

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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.