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Finding the Fourth Proportional to 119.63, 164.80 and 102.09

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Solution

The fourth proportional to 119.63, 164.80 and 102.09 is: 140.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.63 : 164.80 = 102.09 : x
  2. Step 2: Convert to fraction form
    119.63/164.80 = 102.09/x
  3. Step 3: Cross multiply
    119.63x = 164.80 × 102.09
  4. Step 4: Simplify right side
    119.63x = 16,823.10
  5. Step 5: Solve for x
    x = 16,823.10/119.63
  6. Step 6: Final answer
    x = 140.63

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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.