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Finding the Fourth Proportional to 139,432.74, 192,418.32 and 75,770.52

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Solution

The fourth proportional to 139,432.74, 192,418.32 and 75,770.52 is: 104,563.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,432.74 : 192,418.32 = 75,770.52 : x
  2. Step 2: Convert to fraction form
    139,432.74/192,418.32 = 75,770.52/x
  3. Step 3: Cross multiply
    139,432.74x = 192,418.32 × 75,770.52
  4. Step 4: Simplify right side
    139,432.74x = 14,579,636,163.93
  5. Step 5: Solve for x
    x = 14,579,636,163.93/139,432.74
  6. Step 6: Final answer
    x = 104,563.94

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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.