Home / 78,685.20-108,334.80-73,319.76

Finding the Fourth Proportional to 78,685.20, 108,334.80 and 73,319.76

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Solution

The fourth proportional to 78,685.20, 108,334.80 and 73,319.76 is: 100,947.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,685.20 : 108,334.80 = 73,319.76 : x
  2. Step 2: Convert to fraction form
    78,685.20/108,334.80 = 73,319.76/x
  3. Step 3: Cross multiply
    78,685.20x = 108,334.80 × 73,319.76
  4. Step 4: Simplify right side
    78,685.20x = 7,943,081,535.65
  5. Step 5: Solve for x
    x = 7,943,081,535.65/78,685.20
  6. Step 6: Final answer
    x = 100,947.59

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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.