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Finding the Fourth Proportional to 71,089.92, 98,103.76 and 39,258.68

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Solution

The fourth proportional to 71,089.92, 98,103.76 and 39,258.68 is: 54,176.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,089.92 : 98,103.76 = 39,258.68 : x
  2. Step 2: Convert to fraction form
    71,089.92/98,103.76 = 39,258.68/x
  3. Step 3: Cross multiply
    71,089.92x = 98,103.76 × 39,258.68
  4. Step 4: Simplify right side
    71,089.92x = 3,851,423,531.97
  5. Step 5: Solve for x
    x = 3,851,423,531.97/71,089.92
  6. Step 6: Final answer
    x = 54,176.79

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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.