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Finding the Fourth Proportional to 143,686, 198,272.48 and 80,029.72

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Solution

The fourth proportional to 143,686, 198,272.48 and 80,029.72 is: 110,433.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,686 : 198,272.48 = 80,029.72 : x
  2. Step 2: Convert to fraction form
    143,686/198,272.48 = 80,029.72/x
  3. Step 3: Cross multiply
    143,686x = 198,272.48 × 80,029.72
  4. Step 4: Simplify right side
    143,686x = 15,867,691,058.11
  5. Step 5: Solve for x
    x = 15,867,691,058.11/143,686
  6. Step 6: Final answer
    x = 110,433.10

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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.