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Finding the Fourth Proportional to 66,881.31, 100,331.24 and 22,520.75

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Solution

The fourth proportional to 66,881.31, 100,331.24 and 22,520.75 is: 33,784.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,881.31 : 100,331.24 = 22,520.75 : x
  2. Step 2: Convert to fraction form
    66,881.31/100,331.24 = 22,520.75/x
  3. Step 3: Cross multiply
    66,881.31x = 100,331.24 × 22,520.75
  4. Step 4: Simplify right side
    66,881.31x = 2,259,534,521.75
  5. Step 5: Solve for x
    x = 2,259,534,521.75/66,881.31
  6. Step 6: Final answer
    x = 33,784.25

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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.