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Finding the Fourth Proportional to 125,378.11, 188,131.83 and 83,287.27

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Solution

The fourth proportional to 125,378.11, 188,131.83 and 83,287.27 is: 124,973.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,378.11 : 188,131.83 = 83,287.27 : x
  2. Step 2: Convert to fraction form
    125,378.11/188,131.83 = 83,287.27/x
  3. Step 3: Cross multiply
    125,378.11x = 188,131.83 × 83,287.27
  4. Step 4: Simplify right side
    125,378.11x = 15,668,986,520.80
  5. Step 5: Solve for x
    x = 15,668,986,520.80/125,378.11
  6. Step 6: Final answer
    x = 124,973.86

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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.