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Finding the Fourth Proportional to 258,229.61, 387,366.73 and 71,241.11

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Solution

The fourth proportional to 258,229.61, 387,366.73 and 71,241.11 is: 106,867.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,229.61 : 387,366.73 = 71,241.11 : x
  2. Step 2: Convert to fraction form
    258,229.61/387,366.73 = 71,241.11/x
  3. Step 3: Cross multiply
    258,229.61x = 387,366.73 × 71,241.11
  4. Step 4: Simplify right side
    258,229.61x = 27,596,433,707.33
  5. Step 5: Solve for x
    x = 27,596,433,707.33/258,229.61
  6. Step 6: Final answer
    x = 106,867.82

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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.