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Finding the Fourth Proportional to 69,081.42, 103,622.12 and 19,161.52

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Solution

The fourth proportional to 69,081.42, 103,622.12 and 19,161.52 is: 28,742.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,081.42 : 103,622.12 = 19,161.52 : x
  2. Step 2: Convert to fraction form
    69,081.42/103,622.12 = 19,161.52/x
  3. Step 3: Cross multiply
    69,081.42x = 103,622.12 × 19,161.52
  4. Step 4: Simplify right side
    69,081.42x = 1,985,556,916.31
  5. Step 5: Solve for x
    x = 1,985,556,916.31/69,081.42
  6. Step 6: Final answer
    x = 28,742.27

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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.