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Finding the Fourth Proportional to 90,205.90, 124,481.07 and 49,921.36

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Solution

The fourth proportional to 90,205.90, 124,481.07 and 49,921.36 is: 68,889.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,205.90 : 124,481.07 = 49,921.36 : x
  2. Step 2: Convert to fraction form
    90,205.90/124,481.07 = 49,921.36/x
  3. Step 3: Cross multiply
    90,205.90x = 124,481.07 × 49,921.36
  4. Step 4: Simplify right side
    90,205.90x = 6,214,264,308.66
  5. Step 5: Solve for x
    x = 6,214,264,308.66/90,205.90
  6. Step 6: Final answer
    x = 68,889.78

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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.