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Finding the Fourth Proportional to 258,766.80, 388,150.20 and 71,778.30

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Solution

The fourth proportional to 258,766.80, 388,150.20 and 71,778.30 is: 107,667.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,766.80 : 388,150.20 = 71,778.30 : x
  2. Step 2: Convert to fraction form
    258,766.80/388,150.20 = 71,778.30/x
  3. Step 3: Cross multiply
    258,766.80x = 388,150.20 × 71,778.30
  4. Step 4: Simplify right side
    258,766.80x = 27,860,761,500.66
  5. Step 5: Solve for x
    x = 27,860,761,500.66/258,766.80
  6. Step 6: Final answer
    x = 107,667.45

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1.5x scale

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.