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Finding the Fourth Proportional to 136,640.68, 188,616.18 and 102,747.64

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Solution

The fourth proportional to 136,640.68, 188,616.18 and 102,747.64 is: 141,830.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,640.68 : 188,616.18 = 102,747.64 : x
  2. Step 2: Convert to fraction form
    136,640.68/188,616.18 = 102,747.64/x
  3. Step 3: Cross multiply
    136,640.68x = 188,616.18 × 102,747.64
  4. Step 4: Simplify right side
    136,640.68x = 19,379,867,360.82
  5. Step 5: Solve for x
    x = 19,379,867,360.82/136,640.68
  6. Step 6: Final answer
    x = 141,830.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.