Home / 258,773.13-388,156.05-81,290.79

Finding the Fourth Proportional to 258,773.13, 388,156.05 and 81,290.79

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Solution

The fourth proportional to 258,773.13, 388,156.05 and 81,290.79 is: 121,935.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,773.13 : 388,156.05 = 81,290.79 : x
  2. Step 2: Convert to fraction form
    258,773.13/388,156.05 = 81,290.79/x
  3. Step 3: Cross multiply
    258,773.13x = 388,156.05 × 81,290.79
  4. Step 4: Simplify right side
    258,773.13x = 31,553,511,947.78
  5. Step 5: Solve for x
    x = 31,553,511,947.78/258,773.13
  6. Step 6: Final answer
    x = 121,935.04

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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.