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Finding the Fourth Proportional to 139,691.66, 192,773.94 and 76,029.98

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Solution

The fourth proportional to 139,691.66, 192,773.94 and 76,029.98 is: 104,921.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,691.66 : 192,773.94 = 76,029.98 : x
  2. Step 2: Convert to fraction form
    139,691.66/192,773.94 = 76,029.98/x
  3. Step 3: Cross multiply
    139,691.66x = 192,773.94 × 76,029.98
  4. Step 4: Simplify right side
    139,691.66x = 14,656,598,802.72
  5. Step 5: Solve for x
    x = 14,656,598,802.72/139,691.66
  6. Step 6: Final answer
    x = 104,921.07

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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.