Home / 138,512.25-191,146.95-78,896.25

Finding the Fourth Proportional to 138,512.25, 191,146.95 and 78,896.25

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Solution

The fourth proportional to 138,512.25, 191,146.95 and 78,896.25 is: 108,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,512.25 : 191,146.95 = 78,896.25 : x
  2. Step 2: Convert to fraction form
    138,512.25/191,146.95 = 78,896.25/x
  3. Step 3: Cross multiply
    138,512.25x = 191,146.95 × 78,896.25
  4. Step 4: Simplify right side
    138,512.25x = 15,080,777,553.94
  5. Step 5: Solve for x
    x = 15,080,777,553.94/138,512.25
  6. Step 6: Final answer
    x = 108,876.85

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1.5x scale

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.