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Finding the Fourth Proportional to 143.32, 215.08 and 107.26

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Solution

The fourth proportional to 143.32, 215.08 and 107.26 is: 160.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143.32 : 215.08 = 107.26 : x
  2. Step 2: Convert to fraction form
    143.32/215.08 = 107.26/x
  3. Step 3: Cross multiply
    143.32x = 215.08 × 107.26
  4. Step 4: Simplify right side
    143.32x = 23,069.48
  5. Step 5: Solve for x
    x = 23,069.48/143.32
  6. Step 6: Final answer
    x = 160.96

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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.