Home / 81,181.44-121,795.20-25,781.76

Finding the Fourth Proportional to 81,181.44, 121,795.20 and 25,781.76

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Solution

The fourth proportional to 81,181.44, 121,795.20 and 25,781.76 is: 38,679.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,181.44 : 121,795.20 = 25,781.76 : x
  2. Step 2: Convert to fraction form
    81,181.44/121,795.20 = 25,781.76/x
  3. Step 3: Cross multiply
    81,181.44x = 121,795.20 × 25,781.76
  4. Step 4: Simplify right side
    81,181.44x = 3,140,094,615.55
  5. Step 5: Solve for x
    x = 3,140,094,615.55/81,181.44
  6. Step 6: Final answer
    x = 38,679.96

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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.