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Finding the Fourth Proportional to 67,661.73, 101,502.32 and 20,918.25

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Solution

The fourth proportional to 67,661.73, 101,502.32 and 20,918.25 is: 31,380.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,661.73 : 101,502.32 = 20,918.25 : x
  2. Step 2: Convert to fraction form
    67,661.73/101,502.32 = 20,918.25/x
  3. Step 3: Cross multiply
    67,661.73x = 101,502.32 × 20,918.25
  4. Step 4: Simplify right side
    67,661.73x = 2,123,250,800.75
  5. Step 5: Solve for x
    x = 2,123,250,800.75/67,661.73
  6. Step 6: Final answer
    x = 31,380.38

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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.