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Finding the Fourth Proportional to 258,900.87, 388,410.14 and 79,002.39

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Solution

The fourth proportional to 258,900.87, 388,410.14 and 79,002.39 is: 118,521.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,900.87 : 388,410.14 = 79,002.39 : x
  2. Step 2: Convert to fraction form
    258,900.87/388,410.14 = 79,002.39/x
  3. Step 3: Cross multiply
    258,900.87x = 388,410.14 × 79,002.39
  4. Step 4: Simplify right side
    258,900.87x = 30,685,329,360.23
  5. Step 5: Solve for x
    x = 30,685,329,360.23/258,900.87
  6. Step 6: Final answer
    x = 118,521.54

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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.