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Finding the Fourth Proportional to 71,599.13, 98,806.80 and 39,770.99

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Solution

The fourth proportional to 71,599.13, 98,806.80 and 39,770.99 is: 54,883.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,599.13 : 98,806.80 = 39,770.99 : x
  2. Step 2: Convert to fraction form
    71,599.13/98,806.80 = 39,770.99/x
  3. Step 3: Cross multiply
    71,599.13x = 98,806.80 × 39,770.99
  4. Step 4: Simplify right side
    71,599.13x = 3,929,644,254.73
  5. Step 5: Solve for x
    x = 3,929,644,254.73/71,599.13
  6. Step 6: Final answer
    x = 54,883.97

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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.