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Finding the Fourth Proportional to 101,745.92, 140,415.36 and 57,040.64

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Solution

The fourth proportional to 101,745.92, 140,415.36 and 57,040.64 is: 78,719.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,745.92 : 140,415.36 = 57,040.64 : x
  2. Step 2: Convert to fraction form
    101,745.92/140,415.36 = 57,040.64/x
  3. Step 3: Cross multiply
    101,745.92x = 140,415.36 × 57,040.64
  4. Step 4: Simplify right side
    101,745.92x = 8,009,382,000.23
  5. Step 5: Solve for x
    x = 8,009,382,000.23/101,745.92
  6. Step 6: Final answer
    x = 78,719.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.