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Finding the Fourth Proportional to 80,793, 121,189.50 and 28,188.36

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Solution

The fourth proportional to 80,793, 121,189.50 and 28,188.36 is: 42,282.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,793 : 121,189.50 = 28,188.36 : x
  2. Step 2: Convert to fraction form
    80,793/121,189.50 = 28,188.36/x
  3. Step 3: Cross multiply
    80,793x = 121,189.50 × 28,188.36
  4. Step 4: Simplify right side
    80,793x = 3,416,133,254.22
  5. Step 5: Solve for x
    x = 3,416,133,254.22/80,793
  6. Step 6: Final answer
    x = 42,282.54

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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.