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Finding the Fourth Proportional to 79,785.77, 119,678.30 and 20,616.41

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Solution

The fourth proportional to 79,785.77, 119,678.30 and 20,616.41 is: 30,924.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,785.77 : 119,678.30 = 20,616.41 : x
  2. Step 2: Convert to fraction form
    79,785.77/119,678.30 = 20,616.41/x
  3. Step 3: Cross multiply
    79,785.77x = 119,678.30 × 20,616.41
  4. Step 4: Simplify right side
    79,785.77x = 2,467,336,797.82
  5. Step 5: Solve for x
    x = 2,467,336,797.82/79,785.77
  6. Step 6: Final answer
    x = 30,924.52

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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.