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Finding the Fourth Proportional to 75,691.91, 113,540.97 and 28,302.20

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Solution

The fourth proportional to 75,691.91, 113,540.97 and 28,302.20 is: 42,454.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,691.91 : 113,540.97 = 28,302.20 : x
  2. Step 2: Convert to fraction form
    75,691.91/113,540.97 = 28,302.20/x
  3. Step 3: Cross multiply
    75,691.91x = 113,540.97 × 28,302.20
  4. Step 4: Simplify right side
    75,691.91x = 3,213,458,673.43
  5. Step 5: Solve for x
    x = 3,213,458,673.43/75,691.91
  6. Step 6: Final answer
    x = 42,454.46

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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.