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Finding the Fourth Proportional to 261,361.91, 391,996.02 and 69,237.61

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Solution

The fourth proportional to 261,361.91, 391,996.02 and 69,237.61 is: 103,844.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,361.91 : 391,996.02 = 69,237.61 : x
  2. Step 2: Convert to fraction form
    261,361.91/391,996.02 = 69,237.61/x
  3. Step 3: Cross multiply
    261,361.91x = 391,996.02 × 69,237.61
  4. Step 4: Simplify right side
    261,361.91x = 27,140,867,554.31
  5. Step 5: Solve for x
    x = 27,140,867,554.31/261,361.91
  6. Step 6: Final answer
    x = 103,844.01

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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.