Home / 126,738.51-174,899.30-78,991.82

Finding the Fourth Proportional to 126,738.51, 174,899.30 and 78,991.82

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Solution

The fourth proportional to 126,738.51, 174,899.30 and 78,991.82 is: 109,008.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,738.51 : 174,899.30 = 78,991.82 : x
  2. Step 2: Convert to fraction form
    126,738.51/174,899.30 = 78,991.82/x
  3. Step 3: Cross multiply
    126,738.51x = 174,899.30 × 78,991.82
  4. Step 4: Simplify right side
    126,738.51x = 13,815,612,754.27
  5. Step 5: Solve for x
    x = 13,815,612,754.27/126,738.51
  6. Step 6: Final answer
    x = 109,008.80

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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.