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Finding the Fourth Proportional to 177.65, 245.15 and 103.98

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Solution

The fourth proportional to 177.65, 245.15 and 103.98 is: 143.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.65 : 245.15 = 103.98 : x
  2. Step 2: Convert to fraction form
    177.65/245.15 = 103.98/x
  3. Step 3: Cross multiply
    177.65x = 245.15 × 103.98
  4. Step 4: Simplify right side
    177.65x = 25,488.95
  5. Step 5: Solve for x
    x = 25,488.95/177.65
  6. Step 6: Final answer
    x = 143.48

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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.