Home / 139,455.54-192,445.38-78,197.67

Finding the Fourth Proportional to 139,455.54, 192,445.38 and 78,197.67

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Solution

The fourth proportional to 139,455.54, 192,445.38 and 78,197.67 is: 107,910.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,455.54 : 192,445.38 = 78,197.67 : x
  2. Step 2: Convert to fraction form
    139,455.54/192,445.38 = 78,197.67/x
  3. Step 3: Cross multiply
    139,455.54x = 192,445.38 × 78,197.67
  4. Step 4: Simplify right side
    139,455.54x = 15,048,780,318.26
  5. Step 5: Solve for x
    x = 15,048,780,318.26/139,455.54
  6. Step 6: Final answer
    x = 107,910.95

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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.