Home / 68,120.38-102,087.42-51,466.78

Finding the Fourth Proportional to 68,120.38, 102,087.42 and 51,466.78

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Solution

The fourth proportional to 68,120.38, 102,087.42 and 51,466.78 is: 77,129.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,120.38 : 102,087.42 = 51,466.78 : x
  2. Step 2: Convert to fraction form
    68,120.38/102,087.42 = 51,466.78/x
  3. Step 3: Cross multiply
    68,120.38x = 102,087.42 × 51,466.78
  4. Step 4: Simplify right side
    68,120.38x = 5,254,110,785.91
  5. Step 5: Solve for x
    x = 5,254,110,785.91/68,120.38
  6. Step 6: Final answer
    x = 77,129.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.