Home / 138,521.35-191,151.22-80,373.59

Finding the Fourth Proportional to 138,521.35, 191,151.22 and 80,373.59

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Solution

The fourth proportional to 138,521.35, 191,151.22 and 80,373.59 is: 110,910.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,521.35 : 191,151.22 = 80,373.59 : x
  2. Step 2: Convert to fraction form
    138,521.35/191,151.22 = 80,373.59/x
  3. Step 3: Cross multiply
    138,521.35x = 191,151.22 × 80,373.59
  4. Step 4: Simplify right side
    138,521.35x = 15,363,509,784.28
  5. Step 5: Solve for x
    x = 15,363,509,784.28/138,521.35
  6. Step 6: Final answer
    x = 110,910.77

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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.