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Finding the Fourth Proportional to 104.45, 145.16 and 103.34

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Solution

The fourth proportional to 104.45, 145.16 and 103.34 is: 143.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.45 : 145.16 = 103.34 : x
  2. Step 2: Convert to fraction form
    104.45/145.16 = 103.34/x
  3. Step 3: Cross multiply
    104.45x = 145.16 × 103.34
  4. Step 4: Simplify right side
    104.45x = 15,000.83
  5. Step 5: Solve for x
    x = 15,000.83/104.45
  6. Step 6: Final answer
    x = 143.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.