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Finding the Fourth Proportional to 139,432.32, 209,161.44 and 45,938.88

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Solution

The fourth proportional to 139,432.32, 209,161.44 and 45,938.88 is: 68,912.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,432.32 : 209,161.44 = 45,938.88 : x
  2. Step 2: Convert to fraction form
    139,432.32/209,161.44 = 45,938.88/x
  3. Step 3: Cross multiply
    139,432.32x = 209,161.44 × 45,938.88
  4. Step 4: Simplify right side
    139,432.32x = 9,608,642,292.79
  5. Step 5: Solve for x
    x = 9,608,642,292.79/139,432.32
  6. Step 6: Final answer
    x = 68,912.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.