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Finding the Fourth Proportional to 107.24, 161.51 and 89.12

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Solution

The fourth proportional to 107.24, 161.51 and 89.12 is: 134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.24 : 161.51 = 89.12 : x
  2. Step 2: Convert to fraction form
    107.24/161.51 = 89.12/x
  3. Step 3: Cross multiply
    107.24x = 161.51 × 89.12
  4. Step 4: Simplify right side
    107.24x = 14,393.77
  5. Step 5: Solve for x
    x = 14,393.77/107.24
  6. Step 6: Final answer
    x = 134.22

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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.