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Finding the Fourth Proportional to 104.33, 143.84 and 71.66

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Solution

The fourth proportional to 104.33, 143.84 and 71.66 is: 98.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.33 : 143.84 = 71.66 : x
  2. Step 2: Convert to fraction form
    104.33/143.84 = 71.66/x
  3. Step 3: Cross multiply
    104.33x = 143.84 × 71.66
  4. Step 4: Simplify right side
    104.33x = 10,307.22
  5. Step 5: Solve for x
    x = 10,307.22/104.33
  6. Step 6: Final answer
    x = 98.79

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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.