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Finding the Fourth Proportional to 88.82, 122.55 and 53.87

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Solution

The fourth proportional to 88.82, 122.55 and 53.87 is: 74.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.82 : 122.55 = 53.87 : x
  2. Step 2: Convert to fraction form
    88.82/122.55 = 53.87/x
  3. Step 3: Cross multiply
    88.82x = 122.55 × 53.87
  4. Step 4: Simplify right side
    88.82x = 6,601.16
  5. Step 5: Solve for x
    x = 6,601.16/88.82
  6. Step 6: Final answer
    x = 74.32

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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.