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Finding the Fourth Proportional to 69,986.57, 104,958.32 and 20,053.28

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Solution

The fourth proportional to 69,986.57, 104,958.32 and 20,053.28 is: 30,073.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,986.57 : 104,958.32 = 20,053.28 : x
  2. Step 2: Convert to fraction form
    69,986.57/104,958.32 = 20,053.28/x
  3. Step 3: Cross multiply
    69,986.57x = 104,958.32 × 20,053.28
  4. Step 4: Simplify right side
    69,986.57x = 2,104,758,741.42
  5. Step 5: Solve for x
    x = 2,104,758,741.42/69,986.57
  6. Step 6: Final answer
    x = 30,073.75

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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.