Home / 139,216.08-192,115.46-78,785.60

Finding the Fourth Proportional to 139,216.08, 192,115.46 and 78,785.60

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Solution

The fourth proportional to 139,216.08, 192,115.46 and 78,785.60 is: 108,722.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,216.08 : 192,115.46 = 78,785.60 : x
  2. Step 2: Convert to fraction form
    139,216.08/192,115.46 = 78,785.60/x
  3. Step 3: Cross multiply
    139,216.08x = 192,115.46 × 78,785.60
  4. Step 4: Simplify right side
    139,216.08x = 15,135,931,785.38
  5. Step 5: Solve for x
    x = 15,135,931,785.38/139,216.08
  6. Step 6: Final answer
    x = 108,722.58

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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.