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Finding the Fourth Proportional to 64.72, 97.18 and 43.19

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Solution

The fourth proportional to 64.72, 97.18 and 43.19 is: 64.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.72 : 97.18 = 43.19 : x
  2. Step 2: Convert to fraction form
    64.72/97.18 = 43.19/x
  3. Step 3: Cross multiply
    64.72x = 97.18 × 43.19
  4. Step 4: Simplify right side
    64.72x = 4,196.97
  5. Step 5: Solve for x
    x = 4,196.97/64.72
  6. Step 6: Final answer
    x = 64.85

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.