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Finding the Fourth Proportional to 81,554.80, 122,344.38 and 28,959.88

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Solution

The fourth proportional to 81,554.80, 122,344.38 and 28,959.88 is: 43,444.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,554.80 : 122,344.38 = 28,959.88 : x
  2. Step 2: Convert to fraction form
    81,554.80/122,344.38 = 28,959.88/x
  3. Step 3: Cross multiply
    81,554.80x = 122,344.38 × 28,959.88
  4. Step 4: Simplify right side
    81,554.80x = 3,543,078,563.47
  5. Step 5: Solve for x
    x = 3,543,078,563.47/81,554.80
  6. Step 6: Final answer
    x = 43,444.15

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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.