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Finding the Fourth Proportional to 125,131.44, 172,679.67 and 71,447.88

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Solution

The fourth proportional to 125,131.44, 172,679.67 and 71,447.88 is: 98,597.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,131.44 : 172,679.67 = 71,447.88 : x
  2. Step 2: Convert to fraction form
    125,131.44/172,679.67 = 71,447.88/x
  3. Step 3: Cross multiply
    125,131.44x = 172,679.67 × 71,447.88
  4. Step 4: Simplify right side
    125,131.44x = 12,337,596,340.60
  5. Step 5: Solve for x
    x = 12,337,596,340.60/125,131.44
  6. Step 6: Final answer
    x = 98,597.09

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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.