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Finding the Fourth Proportional to 178.26, 245.98 and 100.62

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Solution

The fourth proportional to 178.26, 245.98 and 100.62 is: 138.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.26 : 245.98 = 100.62 : x
  2. Step 2: Convert to fraction form
    178.26/245.98 = 100.62/x
  3. Step 3: Cross multiply
    178.26x = 245.98 × 100.62
  4. Step 4: Simplify right side
    178.26x = 24,750.51
  5. Step 5: Solve for x
    x = 24,750.51/178.26
  6. Step 6: Final answer
    x = 138.84

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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.