Home / 138,167.46-190,694.11-80,015.81

Finding the Fourth Proportional to 138,167.46, 190,694.11 and 80,015.81

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Solution

The fourth proportional to 138,167.46, 190,694.11 and 80,015.81 is: 110,435.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,167.46 : 190,694.11 = 80,015.81 : x
  2. Step 2: Convert to fraction form
    138,167.46/190,694.11 = 80,015.81/x
  3. Step 3: Cross multiply
    138,167.46x = 190,694.11 × 80,015.81
  4. Step 4: Simplify right side
    138,167.46x = 15,258,543,673.88
  5. Step 5: Solve for x
    x = 15,258,543,673.88/138,167.46
  6. Step 6: Final answer
    x = 110,435.15

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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.