Home / 138,620.76-191,337.56-81,272.54

Finding the Fourth Proportional to 138,620.76, 191,337.56 and 81,272.54

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Solution

The fourth proportional to 138,620.76, 191,337.56 and 81,272.54 is: 112,180.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,620.76 : 191,337.56 = 81,272.54 : x
  2. Step 2: Convert to fraction form
    138,620.76/191,337.56 = 81,272.54/x
  3. Step 3: Cross multiply
    138,620.76x = 191,337.56 × 81,272.54
  4. Step 4: Simplify right side
    138,620.76x = 15,550,489,498.60
  5. Step 5: Solve for x
    x = 15,550,489,498.60/138,620.76
  6. Step 6: Final answer
    x = 112,180.09

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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.