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Finding the Fourth Proportional to 71,608.80, 98,818.88 and 39,776.88

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Solution

The fourth proportional to 71,608.80, 98,818.88 and 39,776.88 is: 54,891.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,608.80 : 98,818.88 = 39,776.88 : x
  2. Step 2: Convert to fraction form
    71,608.80/98,818.88 = 39,776.88/x
  3. Step 3: Cross multiply
    71,608.80x = 98,818.88 × 39,776.88
  4. Step 4: Simplify right side
    71,608.80x = 3,930,706,731.49
  5. Step 5: Solve for x
    x = 3,930,706,731.49/71,608.80
  6. Step 6: Final answer
    x = 54,891.39

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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.