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Finding the Fourth Proportional to 118.83, 177.36 and 115.50

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Solution

The fourth proportional to 118.83, 177.36 and 115.50 is: 172.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.83 : 177.36 = 115.50 : x
  2. Step 2: Convert to fraction form
    118.83/177.36 = 115.50/x
  3. Step 3: Cross multiply
    118.83x = 177.36 × 115.50
  4. Step 4: Simplify right side
    118.83x = 20,485.08
  5. Step 5: Solve for x
    x = 20,485.08/118.83
  6. Step 6: Final answer
    x = 172.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.