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Finding the Fourth Proportional to 74,745.52, 112,147.44 and 43,138.88

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Solution

The fourth proportional to 74,745.52, 112,147.44 and 43,138.88 is: 64,725.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,745.52 : 112,147.44 = 43,138.88 : x
  2. Step 2: Convert to fraction form
    74,745.52/112,147.44 = 43,138.88/x
  3. Step 3: Cross multiply
    74,745.52x = 112,147.44 × 43,138.88
  4. Step 4: Simplify right side
    74,745.52x = 4,837,914,956.47
  5. Step 5: Solve for x
    x = 4,837,914,956.47/74,745.52
  6. Step 6: Final answer
    x = 64,725.15

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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.