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Finding the Fourth Proportional to 194.99, 292.52 and 86.81

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Solution

The fourth proportional to 194.99, 292.52 and 86.81 is: 130.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.99 : 292.52 = 86.81 : x
  2. Step 2: Convert to fraction form
    194.99/292.52 = 86.81/x
  3. Step 3: Cross multiply
    194.99x = 292.52 × 86.81
  4. Step 4: Simplify right side
    194.99x = 25,392.42
  5. Step 5: Solve for x
    x = 25,392.42/194.99
  6. Step 6: Final answer
    x = 130.23

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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.