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Finding the Fourth Proportional to 165.02, 247.01 and 121

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Solution

The fourth proportional to 165.02, 247.01 and 121 is: 181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    165.02 : 247.01 = 121 : x
  2. Step 2: Convert to fraction form
    165.02/247.01 = 121/x
  3. Step 3: Cross multiply
    165.02x = 247.01 × 121
  4. Step 4: Simplify right side
    165.02x = 29,888.21
  5. Step 5: Solve for x
    x = 29,888.21/165.02
  6. Step 6: Final answer
    x = 181.12

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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.