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Finding the Fourth Proportional to 104.50, 155.99 and 97.39

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Solution

The fourth proportional to 104.50, 155.99 and 97.39 is: 145.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.50 : 155.99 = 97.39 : x
  2. Step 2: Convert to fraction form
    104.50/155.99 = 97.39/x
  3. Step 3: Cross multiply
    104.50x = 155.99 × 97.39
  4. Step 4: Simplify right side
    104.50x = 15,192.30
  5. Step 5: Solve for x
    x = 15,192.30/104.50
  6. Step 6: Final answer
    x = 145.38

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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.