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Finding the Fourth Proportional to 90.39, 135.60 and 88.93

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Solution

The fourth proportional to 90.39, 135.60 and 88.93 is: 133.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.39 : 135.60 = 88.93 : x
  2. Step 2: Convert to fraction form
    90.39/135.60 = 88.93/x
  3. Step 3: Cross multiply
    90.39x = 135.60 × 88.93
  4. Step 4: Simplify right side
    90.39x = 12,058.91
  5. Step 5: Solve for x
    x = 12,058.91/90.39
  6. Step 6: Final answer
    x = 133.41

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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.