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Finding the Fourth Proportional to 110.61, 165.70 and 83.59

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Solution

The fourth proportional to 110.61, 165.70 and 83.59 is: 125.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    110.61 : 165.70 = 83.59 : x
  2. Step 2: Convert to fraction form
    110.61/165.70 = 83.59/x
  3. Step 3: Cross multiply
    110.61x = 165.70 × 83.59
  4. Step 4: Simplify right side
    110.61x = 13,850.86
  5. Step 5: Solve for x
    x = 13,850.86/110.61
  6. Step 6: Final answer
    x = 125.22

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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.