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Finding the Fourth Proportional to 66,781.97, 100,172.95 and 20,034.84

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Solution

The fourth proportional to 66,781.97, 100,172.95 and 20,034.84 is: 30,052.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,781.97 : 100,172.95 = 20,034.84 : x
  2. Step 2: Convert to fraction form
    66,781.97/100,172.95 = 20,034.84/x
  3. Step 3: Cross multiply
    66,781.97x = 100,172.95 × 20,034.84
  4. Step 4: Simplify right side
    66,781.97x = 2,006,949,463.84
  5. Step 5: Solve for x
    x = 2,006,949,463.84/66,781.97
  6. Step 6: Final answer
    x = 30,052.27

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1.5x scale

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.