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Finding the Fourth Proportional to 179.58, 247.78 and 109.64

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Solution

The fourth proportional to 179.58, 247.78 and 109.64 is: 151.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.58 : 247.78 = 109.64 : x
  2. Step 2: Convert to fraction form
    179.58/247.78 = 109.64/x
  3. Step 3: Cross multiply
    179.58x = 247.78 × 109.64
  4. Step 4: Simplify right side
    179.58x = 27,167.36
  5. Step 5: Solve for x
    x = 27,167.36/179.58
  6. Step 6: Final answer
    x = 151.28

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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.