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Finding the Fourth Proportional to 90,889.28, 125,434 and 50,613.28

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Solution

The fourth proportional to 90,889.28, 125,434 and 50,613.28 is: 69,850.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,889.28 : 125,434 = 50,613.28 : x
  2. Step 2: Convert to fraction form
    90,889.28/125,434 = 50,613.28/x
  3. Step 3: Cross multiply
    90,889.28x = 125,434 × 50,613.28
  4. Step 4: Simplify right side
    90,889.28x = 6,348,626,163.52
  5. Step 5: Solve for x
    x = 6,348,626,163.52/90,889.28
  6. Step 6: Final answer
    x = 69,850.11

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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.