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Finding the Fourth Proportional to 125,610.68, 188,396.40 and 81,549.92

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Solution

The fourth proportional to 125,610.68, 188,396.40 and 81,549.92 is: 122,312.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,610.68 : 188,396.40 = 81,549.92 : x
  2. Step 2: Convert to fraction form
    125,610.68/188,396.40 = 81,549.92/x
  3. Step 3: Cross multiply
    125,610.68x = 188,396.40 × 81,549.92
  4. Step 4: Simplify right side
    125,610.68x = 15,363,711,348.29
  5. Step 5: Solve for x
    x = 15,363,711,348.29/125,610.68
  6. Step 6: Final answer
    x = 122,312.14

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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.