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Finding the Fourth Proportional to 88.88, 133.08 and 78.08

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Solution

The fourth proportional to 88.88, 133.08 and 78.08 is: 116.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.88 : 133.08 = 78.08 : x
  2. Step 2: Convert to fraction form
    88.88/133.08 = 78.08/x
  3. Step 3: Cross multiply
    88.88x = 133.08 × 78.08
  4. Step 4: Simplify right side
    88.88x = 10,390.89
  5. Step 5: Solve for x
    x = 10,390.89/88.88
  6. Step 6: Final answer
    x = 116.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.