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Finding the Fourth Proportional to 71.46, 99.03 and 70.59

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Solution

The fourth proportional to 71.46, 99.03 and 70.59 is: 97.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.46 : 99.03 = 70.59 : x
  2. Step 2: Convert to fraction form
    71.46/99.03 = 70.59/x
  3. Step 3: Cross multiply
    71.46x = 99.03 × 70.59
  4. Step 4: Simplify right side
    71.46x = 6,989.68
  5. Step 5: Solve for x
    x = 6,989.68/71.46
  6. Step 6: Final answer
    x = 97.82

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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.