Home / 139,435.20-192,321.60-85,750.56

Finding the Fourth Proportional to 139,435.20, 192,321.60 and 85,750.56

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Solution

The fourth proportional to 139,435.20, 192,321.60 and 85,750.56 is: 118,274.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,435.20 : 192,321.60 = 85,750.56 : x
  2. Step 2: Convert to fraction form
    139,435.20/192,321.60 = 85,750.56/x
  3. Step 3: Cross multiply
    139,435.20x = 192,321.60 × 85,750.56
  4. Step 4: Simplify right side
    139,435.20x = 16,491,684,900.10
  5. Step 5: Solve for x
    x = 16,491,684,900.10/139,435.20
  6. Step 6: Final answer
    x = 118,274.90

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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.