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Finding the Fourth Proportional to 218,577.99, 301,653.21 and 121,789.89

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Solution

The fourth proportional to 218,577.99, 301,653.21 and 121,789.89 is: 168,078.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,577.99 : 301,653.21 = 121,789.89 : x
  2. Step 2: Convert to fraction form
    218,577.99/301,653.21 = 121,789.89/x
  3. Step 3: Cross multiply
    218,577.99x = 301,653.21 × 121,789.89
  4. Step 4: Simplify right side
    218,577.99x = 36,738,311,264.05
  5. Step 5: Solve for x
    x = 36,738,311,264.05/218,577.99
  6. Step 6: Final answer
    x = 168,078.73

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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.