Home / 138,867.40-191,517.78-108,605.80

Finding the Fourth Proportional to 138,867.40, 191,517.78 and 108,605.80

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Solution

The fourth proportional to 138,867.40, 191,517.78 and 108,605.80 is: 149,782.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,867.40 : 191,517.78 = 108,605.80 : x
  2. Step 2: Convert to fraction form
    138,867.40/191,517.78 = 108,605.80/x
  3. Step 3: Cross multiply
    138,867.40x = 191,517.78 × 108,605.80
  4. Step 4: Simplify right side
    138,867.40x = 20,799,941,711.12
  5. Step 5: Solve for x
    x = 20,799,941,711.12/138,867.40
  6. Step 6: Final answer
    x = 149,782.75

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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.