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Finding the Fourth Proportional to 67,914.30, 101,881.17 and 21,170.82

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Solution

The fourth proportional to 67,914.30, 101,881.17 and 21,170.82 is: 31,759.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,914.30 : 101,881.17 = 21,170.82 : x
  2. Step 2: Convert to fraction form
    67,914.30/101,881.17 = 21,170.82/x
  3. Step 3: Cross multiply
    67,914.30x = 101,881.17 × 21,170.82
  4. Step 4: Simplify right side
    67,914.30x = 2,156,907,911.46
  5. Step 5: Solve for x
    x = 2,156,907,911.46/67,914.30
  6. Step 6: Final answer
    x = 31,759.26

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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.