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Finding the Fourth Proportional to 67,781.28, 101,659.44 and 28,327.80

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Solution

The fourth proportional to 67,781.28, 101,659.44 and 28,327.80 is: 42,486.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,781.28 : 101,659.44 = 28,327.80 : x
  2. Step 2: Convert to fraction form
    67,781.28/101,659.44 = 28,327.80/x
  3. Step 3: Cross multiply
    67,781.28x = 101,659.44 × 28,327.80
  4. Step 4: Simplify right side
    67,781.28x = 2,879,788,284.43
  5. Step 5: Solve for x
    x = 2,879,788,284.43/67,781.28
  6. Step 6: Final answer
    x = 42,486.48

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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.