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Finding the Fourth Proportional to 159.21, 238.19 and 111.02

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Solution

The fourth proportional to 159.21, 238.19 and 111.02 is: 166.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.21 : 238.19 = 111.02 : x
  2. Step 2: Convert to fraction form
    159.21/238.19 = 111.02/x
  3. Step 3: Cross multiply
    159.21x = 238.19 × 111.02
  4. Step 4: Simplify right side
    159.21x = 26,442.11
  5. Step 5: Solve for x
    x = 26,442.11/159.21
  6. Step 6: Final answer
    x = 166.08

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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.