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Finding the Fourth Proportional to 258,760.78, 388,141.14 and 71,772.28

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Solution

The fourth proportional to 258,760.78, 388,141.14 and 71,772.28 is: 107,658.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,760.78 : 388,141.14 = 71,772.28 : x
  2. Step 2: Convert to fraction form
    258,760.78/388,141.14 = 71,772.28/x
  3. Step 3: Cross multiply
    258,760.78x = 388,141.14 × 71,772.28
  4. Step 4: Simplify right side
    258,760.78x = 27,857,774,579.60
  5. Step 5: Solve for x
    x = 27,857,774,579.60/258,760.78
  6. Step 6: Final answer
    x = 107,658.41

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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.