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Finding the Fourth Proportional to 81,543.80, 122,327.88 and 28,948.88

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Solution

The fourth proportional to 81,543.80, 122,327.88 and 28,948.88 is: 43,427.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,543.80 : 122,327.88 = 28,948.88 : x
  2. Step 2: Convert to fraction form
    81,543.80/122,327.88 = 28,948.88/x
  3. Step 3: Cross multiply
    81,543.80x = 122,327.88 × 28,948.88
  4. Step 4: Simplify right side
    81,543.80x = 3,541,255,118.77
  5. Step 5: Solve for x
    x = 3,541,255,118.77/81,543.80
  6. Step 6: Final answer
    x = 43,427.64

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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.