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Finding the Fourth Proportional to 88.83, 133.71 and 81.05

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Solution

The fourth proportional to 88.83, 133.71 and 81.05 is: 122.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.83 : 133.71 = 81.05 : x
  2. Step 2: Convert to fraction form
    88.83/133.71 = 81.05/x
  3. Step 3: Cross multiply
    88.83x = 133.71 × 81.05
  4. Step 4: Simplify right side
    88.83x = 10,836.91
  5. Step 5: Solve for x
    x = 10,836.91/88.83
  6. Step 6: Final answer
    x = 122.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.