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Finding the Fourth Proportional to 125,751.28, 188,691.72 and 55,680.16

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Solution

The fourth proportional to 125,751.28, 188,691.72 and 55,680.16 is: 83,548.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,751.28 : 188,691.72 = 55,680.16 : x
  2. Step 2: Convert to fraction form
    125,751.28/188,691.72 = 55,680.16/x
  3. Step 3: Cross multiply
    125,751.28x = 188,691.72 × 55,680.16
  4. Step 4: Simplify right side
    125,751.28x = 10,506,385,160.28
  5. Step 5: Solve for x
    x = 10,506,385,160.28/125,751.28
  6. Step 6: Final answer
    x = 83,548.93

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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.