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Finding the Fourth Proportional to 90,023, 124,231.74 and 50,279

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Solution

The fourth proportional to 90,023, 124,231.74 and 50,279 is: 69,385.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,023 : 124,231.74 = 50,279 : x
  2. Step 2: Convert to fraction form
    90,023/124,231.74 = 50,279/x
  3. Step 3: Cross multiply
    90,023x = 124,231.74 × 50,279
  4. Step 4: Simplify right side
    90,023x = 6,246,247,655.46
  5. Step 5: Solve for x
    x = 6,246,247,655.46/90,023
  6. Step 6: Final answer
    x = 69,385.02

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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.