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Finding the Fourth Proportional to 90,105, 124,344.96 and 50,361

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Solution

The fourth proportional to 90,105, 124,344.96 and 50,361 is: 69,498.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,105 : 124,344.96 = 50,361 : x
  2. Step 2: Convert to fraction form
    90,105/124,344.96 = 50,361/x
  3. Step 3: Cross multiply
    90,105x = 124,344.96 × 50,361
  4. Step 4: Simplify right side
    90,105x = 6,262,136,530.56
  5. Step 5: Solve for x
    x = 6,262,136,530.56/90,105
  6. Step 6: Final answer
    x = 69,498.21

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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.