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Finding the Fourth Proportional to 139,307.50, 192,244.36 and 79,691.50

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Solution

The fourth proportional to 139,307.50, 192,244.36 and 79,691.50 is: 109,974.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,307.50 : 192,244.36 = 79,691.50 : x
  2. Step 2: Convert to fraction form
    139,307.50/192,244.36 = 79,691.50/x
  3. Step 3: Cross multiply
    139,307.50x = 192,244.36 × 79,691.50
  4. Step 4: Simplify right side
    139,307.50x = 15,320,241,414.94
  5. Step 5: Solve for x
    x = 15,320,241,414.94/139,307.50
  6. Step 6: Final answer
    x = 109,974.28

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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.