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Finding the Fourth Proportional to 158.49, 218.63 and 103.29

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Solution

The fourth proportional to 158.49, 218.63 and 103.29 is: 142.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.49 : 218.63 = 103.29 : x
  2. Step 2: Convert to fraction form
    158.49/218.63 = 103.29/x
  3. Step 3: Cross multiply
    158.49x = 218.63 × 103.29
  4. Step 4: Simplify right side
    158.49x = 22,582.29
  5. Step 5: Solve for x
    x = 22,582.29/158.49
  6. Step 6: Final answer
    x = 142.48

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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.