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Finding the Fourth Proportional to 66,521.10, 99,793.80 and 27,082.20

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Solution

The fourth proportional to 66,521.10, 99,793.80 and 27,082.20 is: 40,628.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,521.10 : 99,793.80 = 27,082.20 : x
  2. Step 2: Convert to fraction form
    66,521.10/99,793.80 = 27,082.20/x
  3. Step 3: Cross multiply
    66,521.10x = 99,793.80 × 27,082.20
  4. Step 4: Simplify right side
    66,521.10x = 2,702,635,650.36
  5. Step 5: Solve for x
    x = 2,702,635,650.36/66,521.10
  6. Step 6: Final answer
    x = 40,628.25

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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.