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Finding the Fourth Proportional to 69,142.86, 95,418.81 and 38,929.19

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Solution

The fourth proportional to 69,142.86, 95,418.81 and 38,929.19 is: 53,723.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,142.86 : 95,418.81 = 38,929.19 : x
  2. Step 2: Convert to fraction form
    69,142.86/95,418.81 = 38,929.19/x
  3. Step 3: Cross multiply
    69,142.86x = 95,418.81 × 38,929.19
  4. Step 4: Simplify right side
    69,142.86x = 3,714,576,506.97
  5. Step 5: Solve for x
    x = 3,714,576,506.97/69,142.86
  6. Step 6: Final answer
    x = 53,723.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.