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Finding the Fourth Proportional to 80,707.47, 121,058.47 and 21,540.01

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Solution

The fourth proportional to 80,707.47, 121,058.47 and 21,540.01 is: 32,309.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,707.47 : 121,058.47 = 21,540.01 : x
  2. Step 2: Convert to fraction form
    80,707.47/121,058.47 = 21,540.01/x
  3. Step 3: Cross multiply
    80,707.47x = 121,058.47 × 21,540.01
  4. Step 4: Simplify right side
    80,707.47x = 2,607,600,654.38
  5. Step 5: Solve for x
    x = 2,607,600,654.38/80,707.47
  6. Step 6: Final answer
    x = 32,309.29

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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.