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Finding the Fourth Proportional to 139,989.08, 210,082.02 and 126,604.64

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Solution

The fourth proportional to 139,989.08, 210,082.02 and 126,604.64 is: 189,995.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,989.08 : 210,082.02 = 126,604.64 : x
  2. Step 2: Convert to fraction form
    139,989.08/210,082.02 = 126,604.64/x
  3. Step 3: Cross multiply
    139,989.08x = 210,082.02 × 126,604.64
  4. Step 4: Simplify right side
    139,989.08x = 26,597,358,512.57
  5. Step 5: Solve for x
    x = 26,597,358,512.57/139,989.08
  6. Step 6: Final answer
    x = 189,995.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.