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Finding the Fourth Proportional to 258,251.48, 387,399.54 and 71,262.98

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Solution

The fourth proportional to 258,251.48, 387,399.54 and 71,262.98 is: 106,900.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,251.48 : 387,399.54 = 71,262.98 : x
  2. Step 2: Convert to fraction form
    258,251.48/387,399.54 = 71,262.98/x
  3. Step 3: Cross multiply
    258,251.48x = 387,399.54 × 71,262.98
  4. Step 4: Simplify right side
    258,251.48x = 27,607,245,671.03
  5. Step 5: Solve for x
    x = 27,607,245,671.03/258,251.48
  6. Step 6: Final answer
    x = 106,900.63

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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.