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Finding the Fourth Proportional to 90,411.80, 124,775.68 and 50,138.20

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Solution

The fourth proportional to 90,411.80, 124,775.68 and 50,138.20 is: 69,194.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,411.80 : 124,775.68 = 50,138.20 : x
  2. Step 2: Convert to fraction form
    90,411.80/124,775.68 = 50,138.20/x
  3. Step 3: Cross multiply
    90,411.80x = 124,775.68 × 50,138.20
  4. Step 4: Simplify right side
    90,411.80x = 6,256,027,375.10
  5. Step 5: Solve for x
    x = 6,256,027,375.10/90,411.80
  6. Step 6: Final answer
    x = 69,194.81

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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.