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Finding the Fourth Proportional to 261,879.84, 392,811.96 and 72,351.56

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Solution

The fourth proportional to 261,879.84, 392,811.96 and 72,351.56 is: 108,525.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,879.84 : 392,811.96 = 72,351.56 : x
  2. Step 2: Convert to fraction form
    261,879.84/392,811.96 = 72,351.56/x
  3. Step 3: Cross multiply
    261,879.84x = 392,811.96 × 72,351.56
  4. Step 4: Simplify right side
    261,879.84x = 28,420,558,092.66
  5. Step 5: Solve for x
    x = 28,420,558,092.66/261,879.84
  6. Step 6: Final answer
    x = 108,525.19

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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.