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Finding the Fourth Proportional to 65,959.80, 98,891.10 and 28,489.20

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Solution

The fourth proportional to 65,959.80, 98,891.10 and 28,489.20 is: 42,712.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,959.80 : 98,891.10 = 28,489.20 : x
  2. Step 2: Convert to fraction form
    65,959.80/98,891.10 = 28,489.20/x
  3. Step 3: Cross multiply
    65,959.80x = 98,891.10 × 28,489.20
  4. Step 4: Simplify right side
    65,959.80x = 2,817,328,326.12
  5. Step 5: Solve for x
    x = 2,817,328,326.12/65,959.80
  6. Step 6: Final answer
    x = 42,712.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.