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Finding the Fourth Proportional to 69,411.13, 104,115.78 and 16,821.07

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Solution

The fourth proportional to 69,411.13, 104,115.78 and 16,821.07 is: 25,231.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,411.13 : 104,115.78 = 16,821.07 : x
  2. Step 2: Convert to fraction form
    69,411.13/104,115.78 = 16,821.07/x
  3. Step 3: Cross multiply
    69,411.13x = 104,115.78 × 16,821.07
  4. Step 4: Simplify right side
    69,411.13x = 1,751,338,563.20
  5. Step 5: Solve for x
    x = 1,751,338,563.20/69,411.13
  6. Step 6: Final answer
    x = 25,231.38

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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.