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Finding the Fourth Proportional to 179.45, 247.64 and 117.45

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Solution

The fourth proportional to 179.45, 247.64 and 117.45 is: 162.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    179.45 : 247.64 = 117.45 : x
  2. Step 2: Convert to fraction form
    179.45/247.64 = 117.45/x
  3. Step 3: Cross multiply
    179.45x = 247.64 × 117.45
  4. Step 4: Simplify right side
    179.45x = 29,085.39
  5. Step 5: Solve for x
    x = 29,085.39/179.45
  6. Step 6: Final answer
    x = 162.08

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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.