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Finding the Fourth Proportional to 219.02, 302.20 and 136.12

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Solution

The fourth proportional to 219.02, 302.20 and 136.12 is: 187.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.02 : 302.20 = 136.12 : x
  2. Step 2: Convert to fraction form
    219.02/302.20 = 136.12/x
  3. Step 3: Cross multiply
    219.02x = 302.20 × 136.12
  4. Step 4: Simplify right side
    219.02x = 41,135.46
  5. Step 5: Solve for x
    x = 41,135.46/219.02
  6. Step 6: Final answer
    x = 187.82

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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.