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Finding the Fourth Proportional to 66,517, 99,781.98 and 17,269

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Solution

The fourth proportional to 66,517, 99,781.98 and 17,269 is: 25,905.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,517 : 99,781.98 = 17,269 : x
  2. Step 2: Convert to fraction form
    66,517/99,781.98 = 17,269/x
  3. Step 3: Cross multiply
    66,517x = 99,781.98 × 17,269
  4. Step 4: Simplify right side
    66,517x = 1,723,135,012.62
  5. Step 5: Solve for x
    x = 1,723,135,012.62/66,517
  6. Step 6: Final answer
    x = 25,905.18

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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.