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Finding the Fourth Proportional to 177.85, 245.43 and 104.17

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Solution

The fourth proportional to 177.85, 245.43 and 104.17 is: 143.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.85 : 245.43 = 104.17 : x
  2. Step 2: Convert to fraction form
    177.85/245.43 = 104.17/x
  3. Step 3: Cross multiply
    177.85x = 245.43 × 104.17
  4. Step 4: Simplify right side
    177.85x = 25,566.44
  5. Step 5: Solve for x
    x = 25,566.44/177.85
  6. Step 6: Final answer
    x = 143.75

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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.