Home / 126,387.12-189,616.11-55,315.95

Finding the Fourth Proportional to 126,387.12, 189,616.11 and 55,315.95

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Solution

The fourth proportional to 126,387.12, 189,616.11 and 55,315.95 is: 82,989.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,387.12 : 189,616.11 = 55,315.95 : x
  2. Step 2: Convert to fraction form
    126,387.12/189,616.11 = 55,315.95/x
  3. Step 3: Cross multiply
    126,387.12x = 189,616.11 × 55,315.95
  4. Step 4: Simplify right side
    126,387.12x = 10,488,795,259.95
  5. Step 5: Solve for x
    x = 10,488,795,259.95/126,387.12
  6. Step 6: Final answer
    x = 82,989.43

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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.