Home / 138,403.58-191,005.56-80,272.13

Finding the Fourth Proportional to 138,403.58, 191,005.56 and 80,272.13

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Solution

The fourth proportional to 138,403.58, 191,005.56 and 80,272.13 is: 110,780.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,403.58 : 191,005.56 = 80,272.13 : x
  2. Step 2: Convert to fraction form
    138,403.58/191,005.56 = 80,272.13/x
  3. Step 3: Cross multiply
    138,403.58x = 191,005.56 × 80,272.13
  4. Step 4: Simplify right side
    138,403.58x = 15,332,422,188.02
  5. Step 5: Solve for x
    x = 15,332,422,188.02/138,403.58
  6. Step 6: Final answer
    x = 110,780.54

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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.