Home / 83,920.28-126,339.80-76,571.96

Finding the Fourth Proportional to 83,920.28, 126,339.80 and 76,571.96

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Solution

The fourth proportional to 83,920.28, 126,339.80 and 76,571.96 is: 115,277.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,920.28 : 126,339.80 = 76,571.96 : x
  2. Step 2: Convert to fraction form
    83,920.28/126,339.80 = 76,571.96/x
  3. Step 3: Cross multiply
    83,920.28x = 126,339.80 × 76,571.96
  4. Step 4: Simplify right side
    83,920.28x = 9,674,085,097.45
  5. Step 5: Solve for x
    x = 9,674,085,097.45/83,920.28
  6. Step 6: Final answer
    x = 115,277.09

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.