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Finding the Fourth Proportional to 178.63, 246.55 and 120.38

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Solution

The fourth proportional to 178.63, 246.55 and 120.38 is: 166.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.63 : 246.55 = 120.38 : x
  2. Step 2: Convert to fraction form
    178.63/246.55 = 120.38/x
  3. Step 3: Cross multiply
    178.63x = 246.55 × 120.38
  4. Step 4: Simplify right side
    178.63x = 29,678.16
  5. Step 5: Solve for x
    x = 29,678.16/178.63
  6. Step 6: Final answer
    x = 166.15

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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.