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Finding the Fourth Proportional to 71,343.79, 98,454.35 and 39,512.68

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Solution

The fourth proportional to 71,343.79, 98,454.35 and 39,512.68 is: 54,527.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,343.79 : 98,454.35 = 39,512.68 : x
  2. Step 2: Convert to fraction form
    71,343.79/98,454.35 = 39,512.68/x
  3. Step 3: Cross multiply
    71,343.79x = 98,454.35 × 39,512.68
  4. Step 4: Simplify right side
    71,343.79x = 3,890,195,078.80
  5. Step 5: Solve for x
    x = 3,890,195,078.80/71,343.79
  6. Step 6: Final answer
    x = 54,527.45

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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.