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Finding the Fourth Proportional to 251,999.97, 378,073.79 and 74,511.60

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Solution

The fourth proportional to 251,999.97, 378,073.79 and 74,511.60 is: 111,789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,999.97 : 378,073.79 = 74,511.60 : x
  2. Step 2: Convert to fraction form
    251,999.97/378,073.79 = 74,511.60/x
  3. Step 3: Cross multiply
    251,999.97x = 378,073.79 × 74,511.60
  4. Step 4: Simplify right side
    251,999.97x = 28,170,882,638.41
  5. Step 5: Solve for x
    x = 28,170,882,638.41/251,999.97
  6. Step 6: Final answer
    x = 111,789.23

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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.