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Finding the Fourth Proportional to 178.79, 268.07 and 70.55

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Solution

The fourth proportional to 178.79, 268.07 and 70.55 is: 105.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.79 : 268.07 = 70.55 : x
  2. Step 2: Convert to fraction form
    178.79/268.07 = 70.55/x
  3. Step 3: Cross multiply
    178.79x = 268.07 × 70.55
  4. Step 4: Simplify right side
    178.79x = 18,910.65
  5. Step 5: Solve for x
    x = 18,910.65/178.79
  6. Step 6: Final answer
    x = 105.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.