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Finding the Fourth Proportional to 86.09, 129.09 and 37.34

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Solution

The fourth proportional to 86.09, 129.09 and 37.34 is: 55.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.09 : 129.09 = 37.34 : x
  2. Step 2: Convert to fraction form
    86.09/129.09 = 37.34/x
  3. Step 3: Cross multiply
    86.09x = 129.09 × 37.34
  4. Step 4: Simplify right side
    86.09x = 4,820.22
  5. Step 5: Solve for x
    x = 4,820.22/86.09
  6. Step 6: Final answer
    x = 55.99

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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.