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Finding the Fourth Proportional to 88.68, 122.27 and 72.28

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Solution

The fourth proportional to 88.68, 122.27 and 72.28 is: 99.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.68 : 122.27 = 72.28 : x
  2. Step 2: Convert to fraction form
    88.68/122.27 = 72.28/x
  3. Step 3: Cross multiply
    88.68x = 122.27 × 72.28
  4. Step 4: Simplify right side
    88.68x = 8,837.68
  5. Step 5: Solve for x
    x = 8,837.68/88.68
  6. Step 6: Final answer
    x = 99.66

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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.