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Finding the Fourth Proportional to 178.84, 246.78 and 101.24

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Solution

The fourth proportional to 178.84, 246.78 and 101.24 is: 139.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.84 : 246.78 = 101.24 : x
  2. Step 2: Convert to fraction form
    178.84/246.78 = 101.24/x
  3. Step 3: Cross multiply
    178.84x = 246.78 × 101.24
  4. Step 4: Simplify right side
    178.84x = 24,984.01
  5. Step 5: Solve for x
    x = 24,984.01/178.84
  6. Step 6: Final answer
    x = 139.70

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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.