Home / 149,240.94-205,945.61-81,257.70

Finding the Fourth Proportional to 149,240.94, 205,945.61 and 81,257.70

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Solution

The fourth proportional to 149,240.94, 205,945.61 and 81,257.70 is: 112,131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,240.94 : 205,945.61 = 81,257.70 : x
  2. Step 2: Convert to fraction form
    149,240.94/205,945.61 = 81,257.70/x
  3. Step 3: Cross multiply
    149,240.94x = 205,945.61 × 81,257.70
  4. Step 4: Simplify right side
    149,240.94x = 16,734,666,959.70
  5. Step 5: Solve for x
    x = 16,734,666,959.70/149,240.94
  6. Step 6: Final answer
    x = 112,131.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.