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Finding the Fourth Proportional to 71.37, 99.02 and 70.67

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Solution

The fourth proportional to 71.37, 99.02 and 70.67 is: 98.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.37 : 99.02 = 70.67 : x
  2. Step 2: Convert to fraction form
    71.37/99.02 = 70.67/x
  3. Step 3: Cross multiply
    71.37x = 99.02 × 70.67
  4. Step 4: Simplify right side
    71.37x = 6,997.42
  5. Step 5: Solve for x
    x = 6,997.42/71.37
  6. Step 6: Final answer
    x = 98.04

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Why These Related Problems?

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