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Finding the Fourth Proportional to 72.26, 108.30 and 38.02

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Solution

The fourth proportional to 72.26, 108.30 and 38.02 is: 56.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.26 : 108.30 = 38.02 : x
  2. Step 2: Convert to fraction form
    72.26/108.30 = 38.02/x
  3. Step 3: Cross multiply
    72.26x = 108.30 × 38.02
  4. Step 4: Simplify right side
    72.26x = 4,117.57
  5. Step 5: Solve for x
    x = 4,117.57/72.26
  6. Step 6: Final answer
    x = 56.98

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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.