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Finding the Fourth Proportional to 204.63, 307.06 and 89.16

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Solution

The fourth proportional to 204.63, 307.06 and 89.16 is: 133.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.63 : 307.06 = 89.16 : x
  2. Step 2: Convert to fraction form
    204.63/307.06 = 89.16/x
  3. Step 3: Cross multiply
    204.63x = 307.06 × 89.16
  4. Step 4: Simplify right side
    204.63x = 27,377.25
  5. Step 5: Solve for x
    x = 27,377.25/204.63
  6. Step 6: Final answer
    x = 133.79

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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.