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Finding the Fourth Proportional to 69,818.88, 104,734.80 and 28,269.12

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Solution

The fourth proportional to 69,818.88, 104,734.80 and 28,269.12 is: 42,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,818.88 : 104,734.80 = 28,269.12 : x
  2. Step 2: Convert to fraction form
    69,818.88/104,734.80 = 28,269.12/x
  3. Step 3: Cross multiply
    69,818.88x = 104,734.80 × 28,269.12
  4. Step 4: Simplify right side
    69,818.88x = 2,960,760,629.38
  5. Step 5: Solve for x
    x = 2,960,760,629.38/69,818.88
  6. Step 6: Final answer
    x = 42,406.30

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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.