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Finding the Fourth Proportional to 158.36, 218.57 and 103.19

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Solution

The fourth proportional to 158.36, 218.57 and 103.19 is: 142.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.36 : 218.57 = 103.19 : x
  2. Step 2: Convert to fraction form
    158.36/218.57 = 103.19/x
  3. Step 3: Cross multiply
    158.36x = 218.57 × 103.19
  4. Step 4: Simplify right side
    158.36x = 22,552.63
  5. Step 5: Solve for x
    x = 22,552.63/158.36
  6. Step 6: Final answer
    x = 142.42

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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.