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Finding the Fourth Proportional to 178.63, 267.79 and 70.50

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Solution

The fourth proportional to 178.63, 267.79 and 70.50 is: 105.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.63 : 267.79 = 70.50 : x
  2. Step 2: Convert to fraction form
    178.63/267.79 = 70.50/x
  3. Step 3: Cross multiply
    178.63x = 267.79 × 70.50
  4. Step 4: Simplify right side
    178.63x = 18,879.20
  5. Step 5: Solve for x
    x = 18,879.20/178.63
  6. Step 6: Final answer
    x = 105.69

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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.