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Finding the Fourth Proportional to 72.96, 101.08 and 71.52

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Solution

The fourth proportional to 72.96, 101.08 and 71.52 is: 99.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.96 : 101.08 = 71.52 : x
  2. Step 2: Convert to fraction form
    72.96/101.08 = 71.52/x
  3. Step 3: Cross multiply
    72.96x = 101.08 × 71.52
  4. Step 4: Simplify right side
    72.96x = 7,229.24
  5. Step 5: Solve for x
    x = 7,229.24/72.96
  6. Step 6: Final answer
    x = 99.09

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These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.