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Finding the Fourth Proportional to 177.72, 245.27 and 99.05

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Solution

The fourth proportional to 177.72, 245.27 and 99.05 is: 136.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.72 : 245.27 = 99.05 : x
  2. Step 2: Convert to fraction form
    177.72/245.27 = 99.05/x
  3. Step 3: Cross multiply
    177.72x = 245.27 × 99.05
  4. Step 4: Simplify right side
    177.72x = 24,293.60
  5. Step 5: Solve for x
    x = 24,293.60/177.72
  6. Step 6: Final answer
    x = 136.70

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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.