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Finding the Fourth Proportional to 69,998.31, 105,002.73 and 20,078.01

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Solution

The fourth proportional to 69,998.31, 105,002.73 and 20,078.01 is: 30,118.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,998.31 : 105,002.73 = 20,078.01 : x
  2. Step 2: Convert to fraction form
    69,998.31/105,002.73 = 20,078.01/x
  3. Step 3: Cross multiply
    69,998.31x = 105,002.73 × 20,078.01
  4. Step 4: Simplify right side
    69,998.31x = 2,108,245,862.97
  5. Step 5: Solve for x
    x = 2,108,245,862.97/69,998.31
  6. Step 6: Final answer
    x = 30,118.53

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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.