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Finding the Fourth Proportional to 69,959.15, 104,907.77 and 20,027.87

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Solution

The fourth proportional to 69,959.15, 104,907.77 and 20,027.87 is: 30,032.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,959.15 : 104,907.77 = 20,027.87 : x
  2. Step 2: Convert to fraction form
    69,959.15/104,907.77 = 20,027.87/x
  3. Step 3: Cross multiply
    69,959.15x = 104,907.77 × 20,027.87
  4. Step 4: Simplify right side
    69,959.15x = 2,101,079,079.41
  5. Step 5: Solve for x
    x = 2,101,079,079.41/69,959.15
  6. Step 6: Final answer
    x = 30,032.94

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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.