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Finding the Fourth Proportional to 104.72, 156.31 and 92.41

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Solution

The fourth proportional to 104.72, 156.31 and 92.41 is: 137.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.72 : 156.31 = 92.41 : x
  2. Step 2: Convert to fraction form
    104.72/156.31 = 92.41/x
  3. Step 3: Cross multiply
    104.72x = 156.31 × 92.41
  4. Step 4: Simplify right side
    104.72x = 14,444.38
  5. Step 5: Solve for x
    x = 14,444.38/104.72
  6. Step 6: Final answer
    x = 137.93

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.