Home / 126,842.29-174,976.00-78,428.75

Finding the Fourth Proportional to 126,842.29, 174,976.00 and 78,428.75

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Solution

The fourth proportional to 126,842.29, 174,976.00 and 78,428.75 is: 108,190.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,842.29 : 174,976.00 = 78,428.75 : x
  2. Step 2: Convert to fraction form
    126,842.29/174,976.00 = 78,428.75/x
  3. Step 3: Cross multiply
    126,842.29x = 174,976.00 × 78,428.75
  4. Step 4: Simplify right side
    126,842.29x = 13,723,147,889.05
  5. Step 5: Solve for x
    x = 13,723,147,889.05/126,842.29
  6. Step 6: Final answer
    x = 108,190.64

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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.