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Finding the Fourth Proportional to 80,793.30, 121,287.15 and 80,210.10

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Solution

The fourth proportional to 80,793.30, 121,287.15 and 80,210.10 is: 120,411.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,793.30 : 121,287.15 = 80,210.10 : x
  2. Step 2: Convert to fraction form
    80,793.30/121,287.15 = 80,210.10/x
  3. Step 3: Cross multiply
    80,793.30x = 121,287.15 × 80,210.10
  4. Step 4: Simplify right side
    80,793.30x = 9,728,454,430.22
  5. Step 5: Solve for x
    x = 9,728,454,430.22/80,793.30
  6. Step 6: Final answer
    x = 120,411.65

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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.