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Finding the Fourth Proportional to 81,245.62, 121,870.92 and 22,082.55

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Solution

The fourth proportional to 81,245.62, 121,870.92 and 22,082.55 is: 33,124.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,245.62 : 121,870.92 = 22,082.55 : x
  2. Step 2: Convert to fraction form
    81,245.62/121,870.92 = 22,082.55/x
  3. Step 3: Cross multiply
    81,245.62x = 121,870.92 × 22,082.55
  4. Step 4: Simplify right side
    81,245.62x = 2,691,220,684.45
  5. Step 5: Solve for x
    x = 2,691,220,684.45/81,245.62
  6. Step 6: Final answer
    x = 33,124.50

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1.5x scale

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.