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Finding the Fourth Proportional to 105.57, 158.38 and 65.03

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Solution

The fourth proportional to 105.57, 158.38 and 65.03 is: 97.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    105.57 : 158.38 = 65.03 : x
  2. Step 2: Convert to fraction form
    105.57/158.38 = 65.03/x
  3. Step 3: Cross multiply
    105.57x = 158.38 × 65.03
  4. Step 4: Simplify right side
    105.57x = 10,299.45
  5. Step 5: Solve for x
    x = 10,299.45/105.57
  6. Step 6: Final answer
    x = 97.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.