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Finding the Fourth Proportional to 119.82, 164.98 and 102.30

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Solution

The fourth proportional to 119.82, 164.98 and 102.30 is: 140.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.82 : 164.98 = 102.30 : x
  2. Step 2: Convert to fraction form
    119.82/164.98 = 102.30/x
  3. Step 3: Cross multiply
    119.82x = 164.98 × 102.30
  4. Step 4: Simplify right side
    119.82x = 16,877.45
  5. Step 5: Solve for x
    x = 16,877.45/119.82
  6. Step 6: Final answer
    x = 140.86

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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.