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Finding the Fourth Proportional to 88.91, 122.54 and 79.59

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Solution

The fourth proportional to 88.91, 122.54 and 79.59 is: 109.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.91 : 122.54 = 79.59 : x
  2. Step 2: Convert to fraction form
    88.91/122.54 = 79.59/x
  3. Step 3: Cross multiply
    88.91x = 122.54 × 79.59
  4. Step 4: Simplify right side
    88.91x = 9,752.96
  5. Step 5: Solve for x
    x = 9,752.96/88.91
  6. Step 6: Final answer
    x = 109.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.