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Finding the Fourth Proportional to 69,871.20, 104,850 and 28,318.56

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Solution

The fourth proportional to 69,871.20, 104,850 and 28,318.56 is: 42,495.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,871.20 : 104,850 = 28,318.56 : x
  2. Step 2: Convert to fraction form
    69,871.20/104,850 = 28,318.56/x
  3. Step 3: Cross multiply
    69,871.20x = 104,850 × 28,318.56
  4. Step 4: Simplify right side
    69,871.20x = 2,969,201,016
  5. Step 5: Solve for x
    x = 2,969,201,016/69,871.20
  6. Step 6: Final answer
    x = 42,495.35

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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.