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Finding the Fourth Proportional to 67,939.20, 101,707.20 and 50,486.40

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Solution

The fourth proportional to 67,939.20, 101,707.20 and 50,486.40 is: 75,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,939.20 : 101,707.20 = 50,486.40 : x
  2. Step 2: Convert to fraction form
    67,939.20/101,707.20 = 50,486.40/x
  3. Step 3: Cross multiply
    67,939.20x = 101,707.20 × 50,486.40
  4. Step 4: Simplify right side
    67,939.20x = 5,134,830,382.08
  5. Step 5: Solve for x
    x = 5,134,830,382.08/67,939.20
  6. Step 6: Final answer
    x = 75,579.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.