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Finding the Fourth Proportional to 178.63, 268.02 and 70.39

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Solution

The fourth proportional to 178.63, 268.02 and 70.39 is: 105.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.63 : 268.02 = 70.39 : x
  2. Step 2: Convert to fraction form
    178.63/268.02 = 70.39/x
  3. Step 3: Cross multiply
    178.63x = 268.02 × 70.39
  4. Step 4: Simplify right side
    178.63x = 18,865.93
  5. Step 5: Solve for x
    x = 18,865.93/178.63
  6. Step 6: Final answer
    x = 105.61

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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.