Home / 81,480.39-121,621.32-75,769.29

Finding the Fourth Proportional to 81,480.39, 121,621.32 and 75,769.29

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Solution

The fourth proportional to 81,480.39, 121,621.32 and 75,769.29 is: 113,096.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,480.39 : 121,621.32 = 75,769.29 : x
  2. Step 2: Convert to fraction form
    81,480.39/121,621.32 = 75,769.29/x
  3. Step 3: Cross multiply
    81,480.39x = 121,621.32 × 75,769.29
  4. Step 4: Simplify right side
    81,480.39x = 9,215,161,065.26
  5. Step 5: Solve for x
    x = 9,215,161,065.26/81,480.39
  6. Step 6: Final answer
    x = 113,096.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.