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Finding the Fourth Proportional to 104.74, 156.30 and 92.59

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Solution

The fourth proportional to 104.74, 156.30 and 92.59 is: 138.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.74 : 156.30 = 92.59 : x
  2. Step 2: Convert to fraction form
    104.74/156.30 = 92.59/x
  3. Step 3: Cross multiply
    104.74x = 156.30 × 92.59
  4. Step 4: Simplify right side
    104.74x = 14,471.82
  5. Step 5: Solve for x
    x = 14,471.82/104.74
  6. Step 6: Final answer
    x = 138.17

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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.