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Finding the Fourth Proportional to 66,680.70, 92,028.07 and 38,387.58

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Solution

The fourth proportional to 66,680.70, 92,028.07 and 38,387.58 is: 52,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,680.70 : 92,028.07 = 38,387.58 : x
  2. Step 2: Convert to fraction form
    66,680.70/92,028.07 = 38,387.58/x
  3. Step 3: Cross multiply
    66,680.70x = 92,028.07 × 38,387.58
  4. Step 4: Simplify right side
    66,680.70x = 3,532,734,899.37
  5. Step 5: Solve for x
    x = 3,532,734,899.37/66,680.70
  6. Step 6: Final answer
    x = 52,979.87

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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.