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Finding the Fourth Proportional to 81,080.82, 121,621.23 and 25,672.50

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Solution

The fourth proportional to 81,080.82, 121,621.23 and 25,672.50 is: 38,508.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,080.82 : 121,621.23 = 25,672.50 : x
  2. Step 2: Convert to fraction form
    81,080.82/121,621.23 = 25,672.50/x
  3. Step 3: Cross multiply
    81,080.82x = 121,621.23 × 25,672.50
  4. Step 4: Simplify right side
    81,080.82x = 3,122,321,027.18
  5. Step 5: Solve for x
    x = 3,122,321,027.18/81,080.82
  6. Step 6: Final answer
    x = 38,508.75

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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.