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Finding the Fourth Proportional to 88.83, 123.21 and 85.05

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Solution

The fourth proportional to 88.83, 123.21 and 85.05 is: 117.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.83 : 123.21 = 85.05 : x
  2. Step 2: Convert to fraction form
    88.83/123.21 = 85.05/x
  3. Step 3: Cross multiply
    88.83x = 123.21 × 85.05
  4. Step 4: Simplify right side
    88.83x = 10,479.01
  5. Step 5: Solve for x
    x = 10,479.01/88.83
  6. Step 6: Final answer
    x = 117.97

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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.