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Finding the Fourth Proportional to 168,612.72, 253,043.81 and 79,866.42

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Solution

The fourth proportional to 168,612.72, 253,043.81 and 79,866.42 is: 119,858.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,612.72 : 253,043.81 = 79,866.42 : x
  2. Step 2: Convert to fraction form
    168,612.72/253,043.81 = 79,866.42/x
  3. Step 3: Cross multiply
    168,612.72x = 253,043.81 × 79,866.42
  4. Step 4: Simplify right side
    168,612.72x = 20,209,703,582.48
  5. Step 5: Solve for x
    x = 20,209,703,582.48/168,612.72
  6. Step 6: Final answer
    x = 119,858.71

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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.