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Finding the Fourth Proportional to 86.74, 119.34 and 75.04

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Solution

The fourth proportional to 86.74, 119.34 and 75.04 is: 103.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.74 : 119.34 = 75.04 : x
  2. Step 2: Convert to fraction form
    86.74/119.34 = 75.04/x
  3. Step 3: Cross multiply
    86.74x = 119.34 × 75.04
  4. Step 4: Simplify right side
    86.74x = 8,955.79
  5. Step 5: Solve for x
    x = 8,955.79/86.74
  6. Step 6: Final answer
    x = 103.25

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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.