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Finding the Fourth Proportional to 261,150.37, 391,781.95 and 81,232.37

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Solution

The fourth proportional to 261,150.37, 391,781.95 and 81,232.37 is: 121,866.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,150.37 : 391,781.95 = 81,232.37 : x
  2. Step 2: Convert to fraction form
    261,150.37/391,781.95 = 81,232.37/x
  3. Step 3: Cross multiply
    261,150.37x = 391,781.95 × 81,232.37
  4. Step 4: Simplify right side
    261,150.37x = 31,825,376,321.72
  5. Step 5: Solve for x
    x = 31,825,376,321.72/261,150.37
  6. Step 6: Final answer
    x = 121,866.10

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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.