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Finding the Fourth Proportional to 218,077.62, 300,947.28 and 121,279.35

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Solution

The fourth proportional to 218,077.62, 300,947.28 and 121,279.35 is: 167,365.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,077.62 : 300,947.28 = 121,279.35 : x
  2. Step 2: Convert to fraction form
    218,077.62/300,947.28 = 121,279.35/x
  3. Step 3: Cross multiply
    218,077.62x = 300,947.28 × 121,279.35
  4. Step 4: Simplify right side
    218,077.62x = 36,498,690,502.67
  5. Step 5: Solve for x
    x = 36,498,690,502.67/218,077.62
  6. Step 6: Final answer
    x = 167,365.59

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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.