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Finding the Fourth Proportional to 90.57, 135.65 and 60.06

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Solution

The fourth proportional to 90.57, 135.65 and 60.06 is: 89.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    90.57 : 135.65 = 60.06 : x
  2. Step 2: Convert to fraction form
    90.57/135.65 = 60.06/x
  3. Step 3: Cross multiply
    90.57x = 135.65 × 60.06
  4. Step 4: Simplify right side
    90.57x = 8,147.29
  5. Step 5: Solve for x
    x = 8,147.29/90.57
  6. Step 6: Final answer
    x = 89.96

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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.