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Finding the Fourth Proportional to 79,951.86, 119,925.36 and 20,786.22

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Solution

The fourth proportional to 79,951.86, 119,925.36 and 20,786.22 is: 31,178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,951.86 : 119,925.36 = 20,786.22 : x
  2. Step 2: Convert to fraction form
    79,951.86/119,925.36 = 20,786.22/x
  3. Step 3: Cross multiply
    79,951.86x = 119,925.36 × 20,786.22
  4. Step 4: Simplify right side
    79,951.86x = 2,492,794,916.54
  5. Step 5: Solve for x
    x = 2,492,794,916.54/79,951.86
  6. Step 6: Final answer
    x = 31,178.70

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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.