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Finding the Fourth Proportional to 88.75, 122.36 and 61.07

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Solution

The fourth proportional to 88.75, 122.36 and 61.07 is: 84.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.75 : 122.36 = 61.07 : x
  2. Step 2: Convert to fraction form
    88.75/122.36 = 61.07/x
  3. Step 3: Cross multiply
    88.75x = 122.36 × 61.07
  4. Step 4: Simplify right side
    88.75x = 7,472.53
  5. Step 5: Solve for x
    x = 7,472.53/88.75
  6. Step 6: Final answer
    x = 84.20

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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.