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Finding the Fourth Proportional to 69,179.70, 103,769.58 and 53,407.76

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Solution

The fourth proportional to 69,179.70, 103,769.58 and 53,407.76 is: 80,111.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,179.70 : 103,769.58 = 53,407.76 : x
  2. Step 2: Convert to fraction form
    69,179.70/103,769.58 = 53,407.76/x
  3. Step 3: Cross multiply
    69,179.70x = 103,769.58 × 53,407.76
  4. Step 4: Simplify right side
    69,179.70x = 5,542,100,305.09
  5. Step 5: Solve for x
    x = 5,542,100,305.09/69,179.70
  6. Step 6: Final answer
    x = 80,111.66

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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.