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Finding the Fourth Proportional to 70,218.97, 105,324.35 and 20,297.96

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Solution

The fourth proportional to 70,218.97, 105,324.35 and 20,297.96 is: 30,445.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,218.97 : 105,324.35 = 20,297.96 : x
  2. Step 2: Convert to fraction form
    70,218.97/105,324.35 = 20,297.96/x
  3. Step 3: Cross multiply
    70,218.97x = 105,324.35 × 20,297.96
  4. Step 4: Simplify right side
    70,218.97x = 2,137,869,324.36
  5. Step 5: Solve for x
    x = 2,137,869,324.36/70,218.97
  6. Step 6: Final answer
    x = 30,445.75

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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.