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Finding the Fourth Proportional to 139,691.25, 192,773.93 and 76,029.50

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Solution

The fourth proportional to 139,691.25, 192,773.93 and 76,029.50 is: 104,920.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,691.25 : 192,773.93 = 76,029.50 : x
  2. Step 2: Convert to fraction form
    139,691.25/192,773.93 = 76,029.50/x
  3. Step 3: Cross multiply
    139,691.25x = 192,773.93 × 76,029.50
  4. Step 4: Simplify right side
    139,691.25x = 14,656,505,612.72
  5. Step 5: Solve for x
    x = 14,656,505,612.72/139,691.25
  6. Step 6: Final answer
    x = 104,920.71

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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.