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Finding the Fourth Proportional to 235.06, 352.55 and 72.70

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Solution

The fourth proportional to 235.06, 352.55 and 72.70 is: 109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.06 : 352.55 = 72.70 : x
  2. Step 2: Convert to fraction form
    235.06/352.55 = 72.70/x
  3. Step 3: Cross multiply
    235.06x = 352.55 × 72.70
  4. Step 4: Simplify right side
    235.06x = 25,629.69
  5. Step 5: Solve for x
    x = 25,629.69/235.06
  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.