Home / 81,751.20-122,657.94-28,449.11

Finding the Fourth Proportional to 81,751.20, 122,657.94 and 28,449.11

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Solution

The fourth proportional to 81,751.20, 122,657.94 and 28,449.11 is: 42,684.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,751.20 : 122,657.94 = 28,449.11 : x
  2. Step 2: Convert to fraction form
    81,751.20/122,657.94 = 28,449.11/x
  3. Step 3: Cross multiply
    81,751.20x = 122,657.94 × 28,449.11
  4. Step 4: Simplify right side
    81,751.20x = 3,489,508,614.14
  5. Step 5: Solve for x
    x = 3,489,508,614.14/81,751.20
  6. Step 6: Final answer
    x = 42,684.49

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1.5x scale

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.