Home / 81,138.42-121,719.15-24,983.20

Finding the Fourth Proportional to 81,138.42, 121,719.15 and 24,983.20

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Solution

The fourth proportional to 81,138.42, 121,719.15 and 24,983.20 is: 37,478.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,138.42 : 121,719.15 = 24,983.20 : x
  2. Step 2: Convert to fraction form
    81,138.42/121,719.15 = 24,983.20/x
  3. Step 3: Cross multiply
    81,138.42x = 121,719.15 × 24,983.20
  4. Step 4: Simplify right side
    81,138.42x = 3,040,933,868.28
  5. Step 5: Solve for x
    x = 3,040,933,868.28/81,138.42
  6. Step 6: Final answer
    x = 37,478.35

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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.