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Finding the Fourth Proportional to 258,765.75, 388,148.63 and 71,777.25

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Solution

The fourth proportional to 258,765.75, 388,148.63 and 71,777.25 is: 107,665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,765.75 : 388,148.63 = 71,777.25 : x
  2. Step 2: Convert to fraction form
    258,765.75/388,148.63 = 71,777.25/x
  3. Step 3: Cross multiply
    258,765.75x = 388,148.63 × 71,777.25
  4. Step 4: Simplify right side
    258,765.75x = 27,860,240,893.78
  5. Step 5: Solve for x
    x = 27,860,240,893.78/258,765.75
  6. Step 6: Final answer
    x = 107,665.88

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Similar ratio
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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.