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Finding the Fourth Proportional to 125,998.20, 188,738.10 and 86,599.80

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Solution

The fourth proportional to 125,998.20, 188,738.10 and 86,599.80 is: 129,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,998.20 : 188,738.10 = 86,599.80 : x
  2. Step 2: Convert to fraction form
    125,998.20/188,738.10 = 86,599.80/x
  3. Step 3: Cross multiply
    125,998.20x = 188,738.10 × 86,599.80
  4. Step 4: Simplify right side
    125,998.20x = 16,344,681,712.38
  5. Step 5: Solve for x
    x = 16,344,681,712.38/125,998.20
  6. Step 6: Final answer
    x = 129,721.55

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1.5x scale

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.