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Finding the Fourth Proportional to 69,099.42, 103,649.10 and 19,179.51

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Solution

The fourth proportional to 69,099.42, 103,649.10 and 19,179.51 is: 28,769.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,099.42 : 103,649.10 = 19,179.51 : x
  2. Step 2: Convert to fraction form
    69,099.42/103,649.10 = 19,179.51/x
  3. Step 3: Cross multiply
    69,099.42x = 103,649.10 × 19,179.51
  4. Step 4: Simplify right side
    69,099.42x = 1,987,938,949.94
  5. Step 5: Solve for x
    x = 1,987,938,949.94/69,099.42
  6. Step 6: Final answer
    x = 28,769.26

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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.