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Finding the Fourth Proportional to 139,650.31, 192,719.74 and 75,988.43

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Solution

The fourth proportional to 139,650.31, 192,719.74 and 75,988.43 is: 104,865.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,650.31 : 192,719.74 = 75,988.43 : x
  2. Step 2: Convert to fraction form
    139,650.31/192,719.74 = 75,988.43/x
  3. Step 3: Cross multiply
    139,650.31x = 192,719.74 × 75,988.43
  4. Step 4: Simplify right side
    139,650.31x = 14,644,470,472.61
  5. Step 5: Solve for x
    x = 14,644,470,472.61/139,650.31
  6. Step 6: Final answer
    x = 104,865.29

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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.