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Finding the Fourth Proportional to 178.90, 246.84 and 101.26

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Solution

The fourth proportional to 178.90, 246.84 and 101.26 is: 139.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.90 : 246.84 = 101.26 : x
  2. Step 2: Convert to fraction form
    178.90/246.84 = 101.26/x
  3. Step 3: Cross multiply
    178.90x = 246.84 × 101.26
  4. Step 4: Simplify right side
    178.90x = 24,995.02
  5. Step 5: Solve for x
    x = 24,995.02/178.90
  6. Step 6: Final answer
    x = 139.72

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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.