Home / 138,581.97-191,243.07-74,919.75

Finding the Fourth Proportional to 138,581.97, 191,243.07 and 74,919.75

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Solution

The fourth proportional to 138,581.97, 191,243.07 and 74,919.75 is: 103,389.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,581.97 : 191,243.07 = 74,919.75 : x
  2. Step 2: Convert to fraction form
    138,581.97/191,243.07 = 74,919.75/x
  3. Step 3: Cross multiply
    138,581.97x = 191,243.07 × 74,919.75
  4. Step 4: Simplify right side
    138,581.97x = 14,327,882,993.63
  5. Step 5: Solve for x
    x = 14,327,882,993.63/138,581.97
  6. Step 6: Final answer
    x = 103,389.23

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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.