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Finding the Fourth Proportional to 125,488.92, 188,249.74 and 66,326.84

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Solution

The fourth proportional to 125,488.92, 188,249.74 and 66,326.84 is: 99,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,488.92 : 188,249.74 = 66,326.84 : x
  2. Step 2: Convert to fraction form
    125,488.92/188,249.74 = 66,326.84/x
  3. Step 3: Cross multiply
    125,488.92x = 188,249.74 × 66,326.84
  4. Step 4: Simplify right side
    125,488.92x = 12,486,010,385.02
  5. Step 5: Solve for x
    x = 12,486,010,385.02/125,488.92
  6. Step 6: Final answer
    x = 99,498.91

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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.