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Finding the Fourth Proportional to 258,899.87, 388,408.64 and 79,001.39

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Solution

The fourth proportional to 258,899.87, 388,408.64 and 79,001.39 is: 118,520.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,899.87 : 388,408.64 = 79,001.39 : x
  2. Step 2: Convert to fraction form
    258,899.87/388,408.64 = 79,001.39/x
  3. Step 3: Cross multiply
    258,899.87x = 388,408.64 × 79,001.39
  4. Step 4: Simplify right side
    258,899.87x = 30,684,820,110.96
  5. Step 5: Solve for x
    x = 30,684,820,110.96/258,899.87
  6. Step 6: Final answer
    x = 118,520.03

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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.