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Finding the Fourth Proportional to 66,743.75, 92,139.71 and 38,443.97

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Solution

The fourth proportional to 66,743.75, 92,139.71 and 38,443.97 is: 53,071.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,743.75 : 92,139.71 = 38,443.97 : x
  2. Step 2: Convert to fraction form
    66,743.75/92,139.71 = 38,443.97/x
  3. Step 3: Cross multiply
    66,743.75x = 92,139.71 × 38,443.97
  4. Step 4: Simplify right side
    66,743.75x = 3,542,216,285.18
  5. Step 5: Solve for x
    x = 3,542,216,285.18/66,743.75
  6. Step 6: Final answer
    x = 53,071.88

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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.