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Finding the Fourth Proportional to 88.56, 122.79 and 83.70

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Solution

The fourth proportional to 88.56, 122.79 and 83.70 is: 116.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.56 : 122.79 = 83.70 : x
  2. Step 2: Convert to fraction form
    88.56/122.79 = 83.70/x
  3. Step 3: Cross multiply
    88.56x = 122.79 × 83.70
  4. Step 4: Simplify right side
    88.56x = 10,277.10
  5. Step 5: Solve for x
    x = 10,277.10/88.56
  6. Step 6: Final answer
    x = 116.05

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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.