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Finding the Fourth Proportional to 258,777.78, 388,166.64 and 71,789.28

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Solution

The fourth proportional to 258,777.78, 388,166.64 and 71,789.28 is: 107,683.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,777.78 : 388,166.64 = 71,789.28 : x
  2. Step 2: Convert to fraction form
    258,777.78/388,166.64 = 71,789.28/x
  3. Step 3: Cross multiply
    258,777.78x = 388,166.64 × 71,789.28
  4. Step 4: Simplify right side
    258,777.78x = 27,866,203,605.62
  5. Step 5: Solve for x
    x = 27,866,203,605.62/258,777.78
  6. Step 6: Final answer
    x = 107,683.91

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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.