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Finding the Fourth Proportional to 177.84, 245.45 and 100.22

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Solution

The fourth proportional to 177.84, 245.45 and 100.22 is: 138.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.84 : 245.45 = 100.22 : x
  2. Step 2: Convert to fraction form
    177.84/245.45 = 100.22/x
  3. Step 3: Cross multiply
    177.84x = 245.45 × 100.22
  4. Step 4: Simplify right side
    177.84x = 24,597.27
  5. Step 5: Solve for x
    x = 24,597.27/177.84
  6. Step 6: Final answer
    x = 138.31

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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.