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Finding the Fourth Proportional to 217,791.43, 300,555.72 and 121,001.53

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Solution

The fourth proportional to 217,791.43, 300,555.72 and 121,001.53 is: 166,984.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,791.43 : 300,555.72 = 121,001.53 : x
  2. Step 2: Convert to fraction form
    217,791.43/300,555.72 = 121,001.53/x
  3. Step 3: Cross multiply
    217,791.43x = 300,555.72 × 121,001.53
  4. Step 4: Simplify right side
    217,791.43x = 36,367,701,970.25
  5. Step 5: Solve for x
    x = 36,367,701,970.25/217,791.43
  6. Step 6: Final answer
    x = 166,984.08

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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.