Home / 111,211,138.38-166,844,492.76-78,485,604.42

Finding the Fourth Proportional to 111,211,138.38, 166,844,492.76 and 78,485,604.42

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Solution

The fourth proportional to 111,211,138.38, 166,844,492.76 and 78,485,604.42 is: 117,748,015.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,211,138.38 : 166,844,492.76 = 78,485,604.42 : x
  2. Step 2: Convert to fraction form
    111,211,138.38/166,844,492.76 = 78,485,604.42/x
  3. Step 3: Cross multiply
    111,211,138.38x = 166,844,492.76 × 78,485,604.42
  4. Step 4: Simplify right side
    111,211,138.38x = 13,094,890,858,416,914
  5. Step 5: Solve for x
    x = 13,094,890,858,416,914/111,211,138.38
  6. Step 6: Final answer
    x = 117,748,015.61

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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.