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Finding the Fourth Proportional to 153.81, 230.69 and 92.91

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Solution

The fourth proportional to 153.81, 230.69 and 92.91 is: 139.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.81 : 230.69 = 92.91 : x
  2. Step 2: Convert to fraction form
    153.81/230.69 = 92.91/x
  3. Step 3: Cross multiply
    153.81x = 230.69 × 92.91
  4. Step 4: Simplify right side
    153.81x = 21,432.94
  5. Step 5: Solve for x
    x = 21,432.94/153.81
  6. Step 6: Final answer
    x = 139.35

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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.