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Finding the Fourth Proportional to 119.18, 164.50 and 113.68

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Solution

The fourth proportional to 119.18, 164.50 and 113.68 is: 156.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    119.18 : 164.50 = 113.68 : x
  2. Step 2: Convert to fraction form
    119.18/164.50 = 113.68/x
  3. Step 3: Cross multiply
    119.18x = 164.50 × 113.68
  4. Step 4: Simplify right side
    119.18x = 18,700.36
  5. Step 5: Solve for x
    x = 18,700.36/119.18
  6. Step 6: Final answer
    x = 156.91

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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.