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Finding the Fourth Proportional to 67,242.72, 100,840.55 and 19,845.24

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Solution

The fourth proportional to 67,242.72, 100,840.55 and 19,845.24 is: 29,760.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,242.72 : 100,840.55 = 19,845.24 : x
  2. Step 2: Convert to fraction form
    67,242.72/100,840.55 = 19,845.24/x
  3. Step 3: Cross multiply
    67,242.72x = 100,840.55 × 19,845.24
  4. Step 4: Simplify right side
    67,242.72x = 2,001,204,439.10
  5. Step 5: Solve for x
    x = 2,001,204,439.10/67,242.72
  6. Step 6: Final answer
    x = 29,760.91

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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.