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Finding the Fourth Proportional to 141.83, 213.10 and 90.50

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Solution

The fourth proportional to 141.83, 213.10 and 90.50 is: 135.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.83 : 213.10 = 90.50 : x
  2. Step 2: Convert to fraction form
    141.83/213.10 = 90.50/x
  3. Step 3: Cross multiply
    141.83x = 213.10 × 90.50
  4. Step 4: Simplify right side
    141.83x = 19,284.48
  5. Step 5: Solve for x
    x = 19,284.48/141.83
  6. Step 6: Final answer
    x = 135.97

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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.