Home / 138,282.45-190,853.61-80,131.04

Finding the Fourth Proportional to 138,282.45, 190,853.61 and 80,131.04

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Solution

The fourth proportional to 138,282.45, 190,853.61 and 80,131.04 is: 110,594.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,282.45 : 190,853.61 = 80,131.04 : x
  2. Step 2: Convert to fraction form
    138,282.45/190,853.61 = 80,131.04/x
  3. Step 3: Cross multiply
    138,282.45x = 190,853.61 × 80,131.04
  4. Step 4: Simplify right side
    138,282.45x = 15,293,297,302.79
  5. Step 5: Solve for x
    x = 15,293,297,302.79/138,282.45
  6. Step 6: Final answer
    x = 110,594.64

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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.