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Finding the Fourth Proportional to 66,997.27, 100,364.52 and 38,858.20

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Solution

The fourth proportional to 66,997.27, 100,364.52 and 38,858.20 is: 58,211.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,997.27 : 100,364.52 = 38,858.20 : x
  2. Step 2: Convert to fraction form
    66,997.27/100,364.52 = 38,858.20/x
  3. Step 3: Cross multiply
    66,997.27x = 100,364.52 × 38,858.20
  4. Step 4: Simplify right side
    66,997.27x = 3,899,984,591.06
  5. Step 5: Solve for x
    x = 3,899,984,591.06/66,997.27
  6. Step 6: Final answer
    x = 58,211.10

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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.