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Finding the Fourth Proportional to 139,351.79, 192,306.49 and 75,689.61

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Solution

The fourth proportional to 139,351.79, 192,306.49 and 75,689.61 is: 104,452.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,351.79 : 192,306.49 = 75,689.61 : x
  2. Step 2: Convert to fraction form
    139,351.79/192,306.49 = 75,689.61/x
  3. Step 3: Cross multiply
    139,351.79x = 192,306.49 × 75,689.61
  4. Step 4: Simplify right side
    139,351.79x = 14,555,602,318.20
  5. Step 5: Solve for x
    x = 14,555,602,318.20/139,351.79
  6. Step 6: Final answer
    x = 104,452.21

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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.