Home / 123,321.15-185,234.22-81,261.54

Finding the Fourth Proportional to 123,321.15, 185,234.22 and 81,261.54

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Solution

The fourth proportional to 123,321.15, 185,234.22 and 81,261.54 is: 122,058.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,321.15 : 185,234.22 = 81,261.54 : x
  2. Step 2: Convert to fraction form
    123,321.15/185,234.22 = 81,261.54/x
  3. Step 3: Cross multiply
    123,321.15x = 185,234.22 × 81,261.54
  4. Step 4: Simplify right side
    123,321.15x = 15,052,417,977.90
  5. Step 5: Solve for x
    x = 15,052,417,977.90/123,321.15
  6. Step 6: Final answer
    x = 122,058.69

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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.