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Finding the Fourth Proportional to 136,686.62, 188,627.82 and 76,255.76

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Solution

The fourth proportional to 136,686.62, 188,627.82 and 76,255.76 is: 105,233.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,686.62 : 188,627.82 = 76,255.76 : x
  2. Step 2: Convert to fraction form
    136,686.62/188,627.82 = 76,255.76/x
  3. Step 3: Cross multiply
    136,686.62x = 188,627.82 × 76,255.76
  4. Step 4: Simplify right side
    136,686.62x = 14,383,957,771.24
  5. Step 5: Solve for x
    x = 14,383,957,771.24/136,686.62
  6. Step 6: Final answer
    x = 105,233.11

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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.