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Finding the Fourth Proportional to 139,691.56, 192,774.36 and 76,029.82

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Solution

The fourth proportional to 139,691.56, 192,774.36 and 76,029.82 is: 104,921.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,691.56 : 192,774.36 = 76,029.82 : x
  2. Step 2: Convert to fraction form
    139,691.56/192,774.36 = 76,029.82/x
  3. Step 3: Cross multiply
    139,691.56x = 192,774.36 × 76,029.82
  4. Step 4: Simplify right side
    139,691.56x = 14,656,599,891.42
  5. Step 5: Solve for x
    x = 14,656,599,891.42/139,691.56
  6. Step 6: Final answer
    x = 104,921.16

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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.