Home / 126,738.89-174,899.82-78,992.19

Finding the Fourth Proportional to 126,738.89, 174,899.82 and 78,992.19

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Solution

The fourth proportional to 126,738.89, 174,899.82 and 78,992.19 is: 109,009.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,738.89 : 174,899.82 = 78,992.19 : x
  2. Step 2: Convert to fraction form
    126,738.89/174,899.82 = 78,992.19/x
  3. Step 3: Cross multiply
    126,738.89x = 174,899.82 × 78,992.19
  4. Step 4: Simplify right side
    126,738.89x = 13,815,719,417.44
  5. Step 5: Solve for x
    x = 13,815,719,417.44/126,738.89
  6. Step 6: Final answer
    x = 109,009.32

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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.