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Finding the Fourth Proportional to 179.08, 247.08 and 120.15

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Solution

The fourth proportional to 179.08, 247.08 and 120.15 is: 165.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.08 : 247.08 = 120.15 : x
  2. Step 2: Convert to fraction form
    179.08/247.08 = 120.15/x
  3. Step 3: Cross multiply
    179.08x = 247.08 × 120.15
  4. Step 4: Simplify right side
    179.08x = 29,686.66
  5. Step 5: Solve for x
    x = 29,686.66/179.08
  6. Step 6: Final answer
    x = 165.77

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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.