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Finding the Fourth Proportional to 90,864, 125,392.28 and 50,576.90

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Solution

The fourth proportional to 90,864, 125,392.28 and 50,576.90 is: 69,796.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,864 : 125,392.28 = 50,576.90 : x
  2. Step 2: Convert to fraction form
    90,864/125,392.28 = 50,576.90/x
  3. Step 3: Cross multiply
    90,864x = 125,392.28 × 50,576.90
  4. Step 4: Simplify right side
    90,864x = 6,341,952,806.33
  5. Step 5: Solve for x
    x = 6,341,952,806.33/90,864
  6. Step 6: Final answer
    x = 69,796.10

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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.