Home / 80,432-120,631.28-30,494.88

Finding the Fourth Proportional to 80,432, 120,631.28 and 30,494.88

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Solution

The fourth proportional to 80,432, 120,631.28 and 30,494.88 is: 45,735.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,432 : 120,631.28 = 30,494.88 : x
  2. Step 2: Convert to fraction form
    80,432/120,631.28 = 30,494.88/x
  3. Step 3: Cross multiply
    80,432x = 120,631.28 × 30,494.88
  4. Step 4: Simplify right side
    80,432x = 3,678,636,407.85
  5. Step 5: Solve for x
    x = 3,678,636,407.85/80,432
  6. Step 6: Final answer
    x = 45,735.98

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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.