Home / 111,346.50-166,601.25-78,131.37

Finding the Fourth Proportional to 111,346.50, 166,601.25 and 78,131.37

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Solution

The fourth proportional to 111,346.50, 166,601.25 and 78,131.37 is: 116,903.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,346.50 : 166,601.25 = 78,131.37 : x
  2. Step 2: Convert to fraction form
    111,346.50/166,601.25 = 78,131.37/x
  3. Step 3: Cross multiply
    111,346.50x = 166,601.25 × 78,131.37
  4. Step 4: Simplify right side
    111,346.50x = 13,016,783,906.21
  5. Step 5: Solve for x
    x = 13,016,783,906.21/111,346.50
  6. Step 6: Final answer
    x = 116,903.40

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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.