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Finding the Fourth Proportional to 258,888.86, 388,355.46 and 79,014.78

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Solution

The fourth proportional to 258,888.86, 388,355.46 and 79,014.78 is: 118,528.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,888.86 : 388,355.46 = 79,014.78 : x
  2. Step 2: Convert to fraction form
    258,888.86/388,355.46 = 79,014.78/x
  3. Step 3: Cross multiply
    258,888.86x = 388,355.46 × 79,014.78
  4. Step 4: Simplify right side
    258,888.86x = 30,685,821,233.70
  5. Step 5: Solve for x
    x = 30,685,821,233.70/258,888.86
  6. Step 6: Final answer
    x = 118,528.94

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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.