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Finding the Fourth Proportional to 125.67, 173.51 and 86.34

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Solution

The fourth proportional to 125.67, 173.51 and 86.34 is: 119.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.67 : 173.51 = 86.34 : x
  2. Step 2: Convert to fraction form
    125.67/173.51 = 86.34/x
  3. Step 3: Cross multiply
    125.67x = 173.51 × 86.34
  4. Step 4: Simplify right side
    125.67x = 14,981.40
  5. Step 5: Solve for x
    x = 14,981.40/125.67
  6. Step 6: Final answer
    x = 119.21

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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.