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Finding the Fourth Proportional to 111,357.60, 166,813.60 and 66,959.88

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Solution

The fourth proportional to 111,357.60, 166,813.60 and 66,959.88 is: 100,305.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,357.60 : 166,813.60 = 66,959.88 : x
  2. Step 2: Convert to fraction form
    111,357.60/166,813.60 = 66,959.88/x
  3. Step 3: Cross multiply
    111,357.60x = 166,813.60 × 66,959.88
  4. Step 4: Simplify right side
    111,357.60x = 11,169,818,638.37
  5. Step 5: Solve for x
    x = 11,169,818,638.37/111,357.60
  6. Step 6: Final answer
    x = 100,305.85

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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.