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Finding the Fourth Proportional to 90,859, 125,371.96 and 54,552.78

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Solution

The fourth proportional to 90,859, 125,371.96 and 54,552.78 is: 75,274.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,859 : 125,371.96 = 54,552.78 : x
  2. Step 2: Convert to fraction form
    90,859/125,371.96 = 54,552.78/x
  3. Step 3: Cross multiply
    90,859x = 125,371.96 × 54,552.78
  4. Step 4: Simplify right side
    90,859x = 6,839,388,952.05
  5. Step 5: Solve for x
    x = 6,839,388,952.05/90,859
  6. Step 6: Final answer
    x = 75,274.75

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1.5x scale

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.