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Finding the Fourth Proportional to 88.98, 123.09 and 86.94

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Solution

The fourth proportional to 88.98, 123.09 and 86.94 is: 120.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.98 : 123.09 = 86.94 : x
  2. Step 2: Convert to fraction form
    88.98/123.09 = 86.94/x
  3. Step 3: Cross multiply
    88.98x = 123.09 × 86.94
  4. Step 4: Simplify right side
    88.98x = 10,701.44
  5. Step 5: Solve for x
    x = 10,701.44/88.98
  6. Step 6: Final answer
    x = 120.27

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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.