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Finding the Fourth Proportional to 125,342.70, 188,078.67 and 83,251.91

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Solution

The fourth proportional to 125,342.70, 188,078.67 and 83,251.91 is: 124,920.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,342.70 : 188,078.67 = 83,251.91 : x
  2. Step 2: Convert to fraction form
    125,342.70/188,078.67 = 83,251.91/x
  3. Step 3: Cross multiply
    125,342.70x = 188,078.67 × 83,251.91
  4. Step 4: Simplify right side
    125,342.70x = 15,657,907,567.37
  5. Step 5: Solve for x
    x = 15,657,907,567.37/125,342.70
  6. Step 6: Final answer
    x = 124,920.78

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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.