Home / 80,778.30-121,157.88-21,618.54

Finding the Fourth Proportional to 80,778.30, 121,157.88 and 21,618.54

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Solution

The fourth proportional to 80,778.30, 121,157.88 and 21,618.54 is: 32,425.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,778.30 : 121,157.88 = 21,618.54 : x
  2. Step 2: Convert to fraction form
    80,778.30/121,157.88 = 21,618.54/x
  3. Step 3: Cross multiply
    80,778.30x = 121,157.88 × 21,618.54
  4. Step 4: Simplify right side
    80,778.30x = 2,619,256,475.10
  5. Step 5: Solve for x
    x = 2,619,256,475.10/80,778.30
  6. Step 6: Final answer
    x = 32,425.25

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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.