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Finding the Fourth Proportional to 69,321.69, 103,982.81 and 19,401.80

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Solution

The fourth proportional to 69,321.69, 103,982.81 and 19,401.80 is: 29,102.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,321.69 : 103,982.81 = 19,401.80 : x
  2. Step 2: Convert to fraction form
    69,321.69/103,982.81 = 19,401.80/x
  3. Step 3: Cross multiply
    69,321.69x = 103,982.81 × 19,401.80
  4. Step 4: Simplify right side
    69,321.69x = 2,017,453,066.13
  5. Step 5: Solve for x
    x = 2,017,453,066.13/69,321.69
  6. Step 6: Final answer
    x = 29,102.77

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1.5x scale

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.