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Finding the Fourth Proportional to 71.35, 97.79 and 70.54

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Solution

The fourth proportional to 71.35, 97.79 and 70.54 is: 96.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.35 : 97.79 = 70.54 : x
  2. Step 2: Convert to fraction form
    71.35/97.79 = 70.54/x
  3. Step 3: Cross multiply
    71.35x = 97.79 × 70.54
  4. Step 4: Simplify right side
    71.35x = 6,898.11
  5. Step 5: Solve for x
    x = 6,898.11/71.35
  6. Step 6: Final answer
    x = 96.68

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.