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Finding the Fourth Proportional to 239,408.46, 330,382.50 and 131,978.16

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Solution

The fourth proportional to 239,408.46, 330,382.50 and 131,978.16 is: 182,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,408.46 : 330,382.50 = 131,978.16 : x
  2. Step 2: Convert to fraction form
    239,408.46/330,382.50 = 131,978.16/x
  3. Step 3: Cross multiply
    239,408.46x = 330,382.50 × 131,978.16
  4. Step 4: Simplify right side
    239,408.46x = 43,603,273,951.28
  5. Step 5: Solve for x
    x = 43,603,273,951.28/239,408.46
  6. Step 6: Final answer
    x = 182,129.21

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1.5x scale

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.