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Finding the Fourth Proportional to 202,112.20, 278,919.32 and 111,470.88

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Solution

The fourth proportional to 202,112.20, 278,919.32 and 111,470.88 is: 153,832.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,112.20 : 278,919.32 = 111,470.88 : x
  2. Step 2: Convert to fraction form
    202,112.20/278,919.32 = 111,470.88/x
  3. Step 3: Cross multiply
    202,112.20x = 278,919.32 × 111,470.88
  4. Step 4: Simplify right side
    202,112.20x = 31,091,382,049.40
  5. Step 5: Solve for x
    x = 31,091,382,049.40/202,112.20
  6. Step 6: Final answer
    x = 153,832.29

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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.