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Finding the Fourth Proportional to 159.36, 238.59 and 121.01

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Solution

The fourth proportional to 159.36, 238.59 and 121.01 is: 181.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.36 : 238.59 = 121.01 : x
  2. Step 2: Convert to fraction form
    159.36/238.59 = 121.01/x
  3. Step 3: Cross multiply
    159.36x = 238.59 × 121.01
  4. Step 4: Simplify right side
    159.36x = 28,870.58
  5. Step 5: Solve for x
    x = 28,870.58/159.36
  6. Step 6: Final answer
    x = 181.17

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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.