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Finding the Fourth Proportional to 165.80, 247.60 and 143.03

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Solution

The fourth proportional to 165.80, 247.60 and 143.03 is: 213.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.80 : 247.60 = 143.03 : x
  2. Step 2: Convert to fraction form
    165.80/247.60 = 143.03/x
  3. Step 3: Cross multiply
    165.80x = 247.60 × 143.03
  4. Step 4: Simplify right side
    165.80x = 35,414.23
  5. Step 5: Solve for x
    x = 35,414.23/165.80
  6. Step 6: Final answer
    x = 213.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.