Home / 126,645.90-189,738.45-103,145.10

Finding the Fourth Proportional to 126,645.90, 189,738.45 and 103,145.10

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Solution

The fourth proportional to 126,645.90, 189,738.45 and 103,145.10 is: 154,530.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,645.90 : 189,738.45 = 103,145.10 : x
  2. Step 2: Convert to fraction form
    126,645.90/189,738.45 = 103,145.10/x
  3. Step 3: Cross multiply
    126,645.90x = 189,738.45 × 103,145.10
  4. Step 4: Simplify right side
    126,645.90x = 19,570,591,399.10
  5. Step 5: Solve for x
    x = 19,570,591,399.10/126,645.90
  6. Step 6: Final answer
    x = 154,530.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.