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Finding the Fourth Proportional to 218,105.48, 300,962.60 and 121,293.66

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Solution

The fourth proportional to 218,105.48, 300,962.60 and 121,293.66 is: 167,372.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,105.48 : 300,962.60 = 121,293.66 : x
  2. Step 2: Convert to fraction form
    218,105.48/300,962.60 = 121,293.66/x
  3. Step 3: Cross multiply
    218,105.48x = 300,962.60 × 121,293.66
  4. Step 4: Simplify right side
    218,105.48x = 36,504,855,277.12
  5. Step 5: Solve for x
    x = 36,504,855,277.12/218,105.48
  6. Step 6: Final answer
    x = 167,372.48

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1.5x scale

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.