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Finding the Fourth Proportional to 66,397.52, 91,622.94 and 38,102.60

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Solution

The fourth proportional to 66,397.52, 91,622.94 and 38,102.60 is: 52,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,397.52 : 91,622.94 = 38,102.60 : x
  2. Step 2: Convert to fraction form
    66,397.52/91,622.94 = 38,102.60/x
  3. Step 3: Cross multiply
    66,397.52x = 91,622.94 × 38,102.60
  4. Step 4: Simplify right side
    66,397.52x = 3,491,072,233.64
  5. Step 5: Solve for x
    x = 3,491,072,233.64/66,397.52
  6. Step 6: Final answer
    x = 52,578.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.