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Finding the Fourth Proportional to 125.98, 173.71 and 79.29

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Solution

The fourth proportional to 125.98, 173.71 and 79.29 is: 109.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.98 : 173.71 = 79.29 : x
  2. Step 2: Convert to fraction form
    125.98/173.71 = 79.29/x
  3. Step 3: Cross multiply
    125.98x = 173.71 × 79.29
  4. Step 4: Simplify right side
    125.98x = 13,774.07
  5. Step 5: Solve for x
    x = 13,774.07/125.98
  6. Step 6: Final answer
    x = 109.34

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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.