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Finding the Fourth Proportional to 258,474.75, 387,712.13 and 71,486.25

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Solution

The fourth proportional to 258,474.75, 387,712.13 and 71,486.25 is: 107,229.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,474.75 : 387,712.13 = 71,486.25 : x
  2. Step 2: Convert to fraction form
    258,474.75/387,712.13 = 71,486.25/x
  3. Step 3: Cross multiply
    258,474.75x = 387,712.13 × 71,486.25
  4. Step 4: Simplify right side
    258,474.75x = 27,716,086,253.21
  5. Step 5: Solve for x
    x = 27,716,086,253.21/258,474.75
  6. Step 6: Final answer
    x = 107,229.38

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1.5x scale

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.