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Finding the Fourth Proportional to 125,843.39, 188,764.88 and 86,280.56

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Solution

The fourth proportional to 125,843.39, 188,764.88 and 86,280.56 is: 129,420.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,843.39 : 188,764.88 = 86,280.56 : x
  2. Step 2: Convert to fraction form
    125,843.39/188,764.88 = 86,280.56/x
  3. Step 3: Cross multiply
    125,843.39x = 188,764.88 × 86,280.56
  4. Step 4: Simplify right side
    125,843.39x = 16,286,738,179.51
  5. Step 5: Solve for x
    x = 16,286,738,179.51/125,843.39
  6. Step 6: Final answer
    x = 129,420.69

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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.