Home / 138,169.25-190,659.97-77,738.57

Finding the Fourth Proportional to 138,169.25, 190,659.97 and 77,738.57

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Solution

The fourth proportional to 138,169.25, 190,659.97 and 77,738.57 is: 107,271.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,169.25 : 190,659.97 = 77,738.57 : x
  2. Step 2: Convert to fraction form
    138,169.25/190,659.97 = 77,738.57/x
  3. Step 3: Cross multiply
    138,169.25x = 190,659.97 × 77,738.57
  4. Step 4: Simplify right side
    138,169.25x = 14,821,633,424.04
  5. Step 5: Solve for x
    x = 14,821,633,424.04/138,169.25
  6. Step 6: Final answer
    x = 107,271.58

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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.