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Finding the Fourth Proportional to 258,082.88, 387,124.38 and 80,605.13

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Solution

The fourth proportional to 258,082.88, 387,124.38 and 80,605.13 is: 120,907.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,082.88 : 387,124.38 = 80,605.13 : x
  2. Step 2: Convert to fraction form
    258,082.88/387,124.38 = 80,605.13/x
  3. Step 3: Cross multiply
    258,082.88x = 387,124.38 × 80,605.13
  4. Step 4: Simplify right side
    258,082.88x = 31,204,209,040.45
  5. Step 5: Solve for x
    x = 31,204,209,040.45/258,082.88
  6. Step 6: Final answer
    x = 120,907.71

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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.