Home / 78,727.38-108,576.91-66,522.57

Finding the Fourth Proportional to 78,727.38, 108,576.91 and 66,522.57

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Solution

The fourth proportional to 78,727.38, 108,576.91 and 66,522.57 is: 91,744.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,727.38 : 108,576.91 = 66,522.57 : x
  2. Step 2: Convert to fraction form
    78,727.38/108,576.91 = 66,522.57/x
  3. Step 3: Cross multiply
    78,727.38x = 108,576.91 × 66,522.57
  4. Step 4: Simplify right side
    78,727.38x = 7,222,814,771.85
  5. Step 5: Solve for x
    x = 7,222,814,771.85/78,727.38
  6. Step 6: Final answer
    x = 91,744.64

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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.