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Finding the Fourth Proportional to 218,449.35, 301,440.91 and 121,645.89

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Solution

The fourth proportional to 218,449.35, 301,440.91 and 121,645.89 is: 167,860.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,449.35 : 301,440.91 = 121,645.89 : x
  2. Step 2: Convert to fraction form
    218,449.35/301,440.91 = 121,645.89/x
  3. Step 3: Cross multiply
    218,449.35x = 301,440.91 × 121,645.89
  4. Step 4: Simplify right side
    218,449.35x = 36,669,047,171.13
  5. Step 5: Solve for x
    x = 36,669,047,171.13/218,449.35
  6. Step 6: Final answer
    x = 167,860.64

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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.