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Finding the Fourth Proportional to 258,493.43, 387,740.28 and 81,014.26

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Solution

The fourth proportional to 258,493.43, 387,740.28 and 81,014.26 is: 121,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,493.43 : 387,740.28 = 81,014.26 : x
  2. Step 2: Convert to fraction form
    258,493.43/387,740.28 = 81,014.26/x
  3. Step 3: Cross multiply
    258,493.43x = 387,740.28 × 81,014.26
  4. Step 4: Simplify right side
    258,493.43x = 31,412,491,856.39
  5. Step 5: Solve for x
    x = 31,412,491,856.39/258,493.43
  6. Step 6: Final answer
    x = 121,521.43

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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.