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Finding the Fourth Proportional to 71,407.97, 98,540.52 and 39,579.83

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Solution

The fourth proportional to 71,407.97, 98,540.52 and 39,579.83 is: 54,618.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,407.97 : 98,540.52 = 39,579.83 : x
  2. Step 2: Convert to fraction form
    71,407.97/98,540.52 = 39,579.83/x
  3. Step 3: Cross multiply
    71,407.97x = 98,540.52 × 39,579.83
  4. Step 4: Simplify right side
    71,407.97x = 3,900,217,029.71
  5. Step 5: Solve for x
    x = 3,900,217,029.71/71,407.97
  6. Step 6: Final answer
    x = 54,618.79

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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.