Home / 138,517.12-191,154.36-81,190.24

Finding the Fourth Proportional to 138,517.12, 191,154.36 and 81,190.24

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Solution

The fourth proportional to 138,517.12, 191,154.36 and 81,190.24 is: 112,042.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,517.12 : 191,154.36 = 81,190.24 : x
  2. Step 2: Convert to fraction form
    138,517.12/191,154.36 = 81,190.24/x
  3. Step 3: Cross multiply
    138,517.12x = 191,154.36 × 81,190.24
  4. Step 4: Simplify right side
    138,517.12x = 15,519,868,365.45
  5. Step 5: Solve for x
    x = 15,519,868,365.45/138,517.12
  6. Step 6: Final answer
    x = 112,042.96

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1.5x scale

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.