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Finding the Fourth Proportional to 60,810.28, 91,209 and 28,781.68

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Solution

The fourth proportional to 60,810.28, 91,209 and 28,781.68 is: 43,169.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,810.28 : 91,209 = 28,781.68 : x
  2. Step 2: Convert to fraction form
    60,810.28/91,209 = 28,781.68/x
  3. Step 3: Cross multiply
    60,810.28x = 91,209 × 28,781.68
  4. Step 4: Simplify right side
    60,810.28x = 2,625,148,251.12
  5. Step 5: Solve for x
    x = 2,625,148,251.12/60,810.28
  6. Step 6: Final answer
    x = 43,169.48

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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.