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Finding the Fourth Proportional to 258,762.78, 388,144.14 and 71,774.28

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Solution

The fourth proportional to 258,762.78, 388,144.14 and 71,774.28 is: 107,661.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,762.78 : 388,144.14 = 71,774.28 : x
  2. Step 2: Convert to fraction form
    258,762.78/388,144.14 = 71,774.28/x
  3. Step 3: Cross multiply
    258,762.78x = 388,144.14 × 71,774.28
  4. Step 4: Simplify right side
    258,762.78x = 27,858,766,184.72
  5. Step 5: Solve for x
    x = 27,858,766,184.72/258,762.78
  6. Step 6: Final answer
    x = 107,661.41

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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.