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Finding the Fourth Proportional to 175.45, 263.16 and 72.70

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Solution

The fourth proportional to 175.45, 263.16 and 72.70 is: 109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    175.45 : 263.16 = 72.70 : x
  2. Step 2: Convert to fraction form
    175.45/263.16 = 72.70/x
  3. Step 3: Cross multiply
    175.45x = 263.16 × 72.70
  4. Step 4: Simplify right side
    175.45x = 19,131.73
  5. Step 5: Solve for x
    x = 19,131.73/175.45
  6. Step 6: Final answer
    x = 109.04

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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.