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Finding the Fourth Proportional to 104.93, 158.16 and 103.31

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Solution

The fourth proportional to 104.93, 158.16 and 103.31 is: 155.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.93 : 158.16 = 103.31 : x
  2. Step 2: Convert to fraction form
    104.93/158.16 = 103.31/x
  3. Step 3: Cross multiply
    104.93x = 158.16 × 103.31
  4. Step 4: Simplify right side
    104.93x = 16,338.72
  5. Step 5: Solve for x
    x = 16,338.72/104.93
  6. Step 6: Final answer
    x = 155.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.