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Finding the Fourth Proportional to 89.48, 135.04 and 88.40

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Solution

The fourth proportional to 89.48, 135.04 and 88.40 is: 133.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.48 : 135.04 = 88.40 : x
  2. Step 2: Convert to fraction form
    89.48/135.04 = 88.40/x
  3. Step 3: Cross multiply
    89.48x = 135.04 × 88.40
  4. Step 4: Simplify right side
    89.48x = 11,937.54
  5. Step 5: Solve for x
    x = 11,937.54/89.48
  6. Step 6: Final answer
    x = 133.41

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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.