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Finding the Fourth Proportional to 88.72, 133.18 and 45.44

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Solution

The fourth proportional to 88.72, 133.18 and 45.44 is: 68.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.72 : 133.18 = 45.44 : x
  2. Step 2: Convert to fraction form
    88.72/133.18 = 45.44/x
  3. Step 3: Cross multiply
    88.72x = 133.18 × 45.44
  4. Step 4: Simplify right side
    88.72x = 6,051.24
  5. Step 5: Solve for x
    x = 6,051.24/88.72
  6. Step 6: Final answer
    x = 68.21

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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.