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Finding the Fourth Proportional to 118.05, 177.08 and 53.05

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Solution

The fourth proportional to 118.05, 177.08 and 53.05 is: 79.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.05 : 177.08 = 53.05 : x
  2. Step 2: Convert to fraction form
    118.05/177.08 = 53.05/x
  3. Step 3: Cross multiply
    118.05x = 177.08 × 53.05
  4. Step 4: Simplify right side
    118.05x = 9,393.21
  5. Step 5: Solve for x
    x = 9,393.21/118.05
  6. Step 6: Final answer
    x = 79.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.