Home / 81,139.42-121,720.65-24,984.20

Finding the Fourth Proportional to 81,139.42, 121,720.65 and 24,984.20

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Solution

The fourth proportional to 81,139.42, 121,720.65 and 24,984.20 is: 37,479.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,139.42 : 121,720.65 = 24,984.20 : x
  2. Step 2: Convert to fraction form
    81,139.42/121,720.65 = 24,984.20/x
  3. Step 3: Cross multiply
    81,139.42x = 121,720.65 × 24,984.20
  4. Step 4: Simplify right side
    81,139.42x = 3,041,093,063.73
  5. Step 5: Solve for x
    x = 3,041,093,063.73/81,139.42
  6. Step 6: Final answer
    x = 37,479.85

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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.