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Finding the Fourth Proportional to 104.37, 143.12 and 100.92

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Solution

The fourth proportional to 104.37, 143.12 and 100.92 is: 138.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.37 : 143.12 = 100.92 : x
  2. Step 2: Convert to fraction form
    104.37/143.12 = 100.92/x
  3. Step 3: Cross multiply
    104.37x = 143.12 × 100.92
  4. Step 4: Simplify right side
    104.37x = 14,443.17
  5. Step 5: Solve for x
    x = 14,443.17/104.37
  6. Step 6: Final answer
    x = 138.38

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.