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Finding the Fourth Proportional to 261,910.92, 392,866.44 and 74,922.42

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Solution

The fourth proportional to 261,910.92, 392,866.44 and 74,922.42 is: 112,383.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,910.92 : 392,866.44 = 74,922.42 : x
  2. Step 2: Convert to fraction form
    261,910.92/392,866.44 = 74,922.42/x
  3. Step 3: Cross multiply
    261,910.92x = 392,866.44 × 74,922.42
  4. Step 4: Simplify right side
    261,910.92x = 29,434,504,421.58
  5. Step 5: Solve for x
    x = 29,434,504,421.58/261,910.92
  6. Step 6: Final answer
    x = 112,383.65

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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.