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Finding the Fourth Proportional to 67,476.10, 101,216.55 and 20,728.90

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Solution

The fourth proportional to 67,476.10, 101,216.55 and 20,728.90 is: 31,094.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,476.10 : 101,216.55 = 20,728.90 : x
  2. Step 2: Convert to fraction form
    67,476.10/101,216.55 = 20,728.90/x
  3. Step 3: Cross multiply
    67,476.10x = 101,216.55 × 20,728.90
  4. Step 4: Simplify right side
    67,476.10x = 2,098,107,743.30
  5. Step 5: Solve for x
    x = 2,098,107,743.30/67,476.10
  6. Step 6: Final answer
    x = 31,094.09

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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.