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Finding the Fourth Proportional to 80,879.96, 111,612.80 and 45,069.18

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Solution

The fourth proportional to 80,879.96, 111,612.80 and 45,069.18 is: 62,194.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,879.96 : 111,612.80 = 45,069.18 : x
  2. Step 2: Convert to fraction form
    80,879.96/111,612.80 = 45,069.18/x
  3. Step 3: Cross multiply
    80,879.96x = 111,612.80 × 45,069.18
  4. Step 4: Simplify right side
    80,879.96x = 5,030,297,148.16
  5. Step 5: Solve for x
    x = 5,030,297,148.16/80,879.96
  6. Step 6: Final answer
    x = 62,194.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.