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Finding the Fourth Proportional to 82.88, 124.06 and 46.70

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Solution

The fourth proportional to 82.88, 124.06 and 46.70 is: 69.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82.88 : 124.06 = 46.70 : x
  2. Step 2: Convert to fraction form
    82.88/124.06 = 46.70/x
  3. Step 3: Cross multiply
    82.88x = 124.06 × 46.70
  4. Step 4: Simplify right side
    82.88x = 5,793.60
  5. Step 5: Solve for x
    x = 5,793.60/82.88
  6. Step 6: Final answer
    x = 69.90

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Why These Related Problems?

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