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Finding the Fourth Proportional to 70.73, 97.68 and 56.99

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Solution

The fourth proportional to 70.73, 97.68 and 56.99 is: 78.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.73 : 97.68 = 56.99 : x
  2. Step 2: Convert to fraction form
    70.73/97.68 = 56.99/x
  3. Step 3: Cross multiply
    70.73x = 97.68 × 56.99
  4. Step 4: Simplify right side
    70.73x = 5,567.03
  5. Step 5: Solve for x
    x = 5,567.03/70.73
  6. Step 6: Final answer
    x = 78.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.