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Finding the Fourth Proportional to 80,775, 121,147.88 and 28,199.52

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Solution

The fourth proportional to 80,775, 121,147.88 and 28,199.52 is: 42,294.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,775 : 121,147.88 = 28,199.52 : x
  2. Step 2: Convert to fraction form
    80,775/121,147.88 = 28,199.52/x
  3. Step 3: Cross multiply
    80,775x = 121,147.88 × 28,199.52
  4. Step 4: Simplify right side
    80,775x = 3,416,311,924.02
  5. Step 5: Solve for x
    x = 3,416,311,924.02/80,775
  6. Step 6: Final answer
    x = 42,294.17

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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.