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Finding the Fourth Proportional to 80,909.56, 120,482.92 and 80,025.20

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Solution

The fourth proportional to 80,909.56, 120,482.92 and 80,025.20 is: 119,166.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,909.56 : 120,482.92 = 80,025.20 : x
  2. Step 2: Convert to fraction form
    80,909.56/120,482.92 = 80,025.20/x
  3. Step 3: Cross multiply
    80,909.56x = 120,482.92 × 80,025.20
  4. Step 4: Simplify right side
    80,909.56x = 9,641,669,769.58
  5. Step 5: Solve for x
    x = 9,641,669,769.58/80,909.56
  6. Step 6: Final answer
    x = 119,166.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.