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Finding the Fourth Proportional to 218,553.56, 301,599.34 and 121,757.28

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Solution

The fourth proportional to 218,553.56, 301,599.34 and 121,757.28 is: 168,022.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,553.56 : 301,599.34 = 121,757.28 : x
  2. Step 2: Convert to fraction form
    218,553.56/301,599.34 = 121,757.28/x
  3. Step 3: Cross multiply
    218,553.56x = 301,599.34 × 121,757.28
  4. Step 4: Simplify right side
    218,553.56x = 36,721,915,590.14
  5. Step 5: Solve for x
    x = 36,721,915,590.14/218,553.56
  6. Step 6: Final answer
    x = 168,022.50

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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.