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Finding the Fourth Proportional to 220,665, 304,543.65 and 131,241

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Solution

The fourth proportional to 220,665, 304,543.65 and 131,241 is: 181,128.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,665 : 304,543.65 = 131,241 : x
  2. Step 2: Convert to fraction form
    220,665/304,543.65 = 131,241/x
  3. Step 3: Cross multiply
    220,665x = 304,543.65 × 131,241
  4. Step 4: Simplify right side
    220,665x = 39,968,613,169.65
  5. Step 5: Solve for x
    x = 39,968,613,169.65/220,665
  6. Step 6: Final answer
    x = 181,128.01

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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.