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Finding the Fourth Proportional to 71,175.40, 98,217.84 and 39,342.40

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Solution

The fourth proportional to 71,175.40, 98,217.84 and 39,342.40 is: 54,290.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,175.40 : 98,217.84 = 39,342.40 : x
  2. Step 2: Convert to fraction form
    71,175.40/98,217.84 = 39,342.40/x
  3. Step 3: Cross multiply
    71,175.40x = 98,217.84 × 39,342.40
  4. Step 4: Simplify right side
    71,175.40x = 3,864,125,548.42
  5. Step 5: Solve for x
    x = 3,864,125,548.42/71,175.40
  6. Step 6: Final answer
    x = 54,290.18

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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.