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Finding the Fourth Proportional to 80,668, 121,001.56 and 20,696.20

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Solution

The fourth proportional to 80,668, 121,001.56 and 20,696.20 is: 31,044.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,668 : 121,001.56 = 20,696.20 : x
  2. Step 2: Convert to fraction form
    80,668/121,001.56 = 20,696.20/x
  3. Step 3: Cross multiply
    80,668x = 121,001.56 × 20,696.20
  4. Step 4: Simplify right side
    80,668x = 2,504,272,486.07
  5. Step 5: Solve for x
    x = 2,504,272,486.07/80,668
  6. Step 6: Final answer
    x = 31,044.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.