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Finding the Fourth Proportional to 104.10, 143.50 and 102.73

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Solution

The fourth proportional to 104.10, 143.50 and 102.73 is: 141.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.10 : 143.50 = 102.73 : x
  2. Step 2: Convert to fraction form
    104.10/143.50 = 102.73/x
  3. Step 3: Cross multiply
    104.10x = 143.50 × 102.73
  4. Step 4: Simplify right side
    104.10x = 14,741.76
  5. Step 5: Solve for x
    x = 14,741.76/104.10
  6. Step 6: Final answer
    x = 141.61

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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.