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Finding the Fourth Proportional to 111,460.80, 166,964.40 and 69,211.20

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Solution

The fourth proportional to 111,460.80, 166,964.40 and 69,211.20 is: 103,675.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,460.80 : 166,964.40 = 69,211.20 : x
  2. Step 2: Convert to fraction form
    111,460.80/166,964.40 = 69,211.20/x
  3. Step 3: Cross multiply
    111,460.80x = 166,964.40 × 69,211.20
  4. Step 4: Simplify right side
    111,460.80x = 11,555,806,481.28
  5. Step 5: Solve for x
    x = 11,555,806,481.28/111,460.80
  6. Step 6: Final answer
    x = 103,675.97

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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.