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Finding the Fourth Proportional to 178.51, 246.25 and 120.19

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Solution

The fourth proportional to 178.51, 246.25 and 120.19 is: 165.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.51 : 246.25 = 120.19 : x
  2. Step 2: Convert to fraction form
    178.51/246.25 = 120.19/x
  3. Step 3: Cross multiply
    178.51x = 246.25 × 120.19
  4. Step 4: Simplify right side
    178.51x = 29,596.79
  5. Step 5: Solve for x
    x = 29,596.79/178.51
  6. Step 6: Final answer
    x = 165.80

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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.