Home / 139,126.72-192,025.20-85,439.92

Finding the Fourth Proportional to 139,126.72, 192,025.20 and 85,439.92

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Solution

The fourth proportional to 139,126.72, 192,025.20 and 85,439.92 is: 117,925.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,126.72 : 192,025.20 = 85,439.92 : x
  2. Step 2: Convert to fraction form
    139,126.72/192,025.20 = 85,439.92/x
  3. Step 3: Cross multiply
    139,126.72x = 192,025.20 × 85,439.92
  4. Step 4: Simplify right side
    139,126.72x = 16,406,617,725.98
  5. Step 5: Solve for x
    x = 16,406,617,725.98/139,126.72
  6. Step 6: Final answer
    x = 117,925.71

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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.