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Finding the Fourth Proportional to 84,269.76, 126,441.52 and 39,928.20

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Solution

The fourth proportional to 84,269.76, 126,441.52 and 39,928.20 is: 59,909.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,269.76 : 126,441.52 = 39,928.20 : x
  2. Step 2: Convert to fraction form
    84,269.76/126,441.52 = 39,928.20/x
  3. Step 3: Cross multiply
    84,269.76x = 126,441.52 × 39,928.20
  4. Step 4: Simplify right side
    84,269.76x = 5,048,582,298.86
  5. Step 5: Solve for x
    x = 5,048,582,298.86/84,269.76
  6. Step 6: Final answer
    x = 59,909.77

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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.