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Finding the Fourth Proportional to 125.79, 173.40 and 84.33

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Solution

The fourth proportional to 125.79, 173.40 and 84.33 is: 116.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.79 : 173.40 = 84.33 : x
  2. Step 2: Convert to fraction form
    125.79/173.40 = 84.33/x
  3. Step 3: Cross multiply
    125.79x = 173.40 × 84.33
  4. Step 4: Simplify right side
    125.79x = 14,622.82
  5. Step 5: Solve for x
    x = 14,622.82/125.79
  6. Step 6: Final answer
    x = 116.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.