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Finding the Fourth Proportional to 71,445.44, 98,600.28 and 39,620.54

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Solution

The fourth proportional to 71,445.44, 98,600.28 and 39,620.54 is: 54,679.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,445.44 : 98,600.28 = 39,620.54 : x
  2. Step 2: Convert to fraction form
    71,445.44/98,600.28 = 39,620.54/x
  3. Step 3: Cross multiply
    71,445.44x = 98,600.28 × 39,620.54
  4. Step 4: Simplify right side
    71,445.44x = 3,906,596,337.75
  5. Step 5: Solve for x
    x = 3,906,596,337.75/71,445.44
  6. Step 6: Final answer
    x = 54,679.44

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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.