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Finding the Fourth Proportional to 88.43, 122.07 and 55.68

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Solution

The fourth proportional to 88.43, 122.07 and 55.68 is: 76.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.43 : 122.07 = 55.68 : x
  2. Step 2: Convert to fraction form
    88.43/122.07 = 55.68/x
  3. Step 3: Cross multiply
    88.43x = 122.07 × 55.68
  4. Step 4: Simplify right side
    88.43x = 6,796.86
  5. Step 5: Solve for x
    x = 6,796.86/88.43
  6. Step 6: Final answer
    x = 76.86

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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.