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Finding the Fourth Proportional to 218,554.56, 301,600.72 and 121,758.28

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Solution

The fourth proportional to 218,554.56, 301,600.72 and 121,758.28 is: 168,023.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,554.56 : 301,600.72 = 121,758.28 : x
  2. Step 2: Convert to fraction form
    218,554.56/301,600.72 = 121,758.28/x
  3. Step 3: Cross multiply
    218,554.56x = 301,600.72 × 121,758.28
  4. Step 4: Simplify right side
    218,554.56x = 36,722,384,913.96
  5. Step 5: Solve for x
    x = 36,722,384,913.96/218,554.56
  6. Step 6: Final answer
    x = 168,023.88

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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.