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Finding the Fourth Proportional to 88.33, 122.70 and 87.53

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Solution

The fourth proportional to 88.33, 122.70 and 87.53 is: 121.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.33 : 122.70 = 87.53 : x
  2. Step 2: Convert to fraction form
    88.33/122.70 = 87.53/x
  3. Step 3: Cross multiply
    88.33x = 122.70 × 87.53
  4. Step 4: Simplify right side
    88.33x = 10,739.93
  5. Step 5: Solve for x
    x = 10,739.93/88.33
  6. Step 6: Final answer
    x = 121.59

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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.