Home / 78,786.20-108,720.62-44,790

Finding the Fourth Proportional to 78,786.20, 108,720.62 and 44,790

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Solution

The fourth proportional to 78,786.20, 108,720.62 and 44,790 is: 61,807.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,786.20 : 108,720.62 = 44,790 : x
  2. Step 2: Convert to fraction form
    78,786.20/108,720.62 = 44,790/x
  3. Step 3: Cross multiply
    78,786.20x = 108,720.62 × 44,790
  4. Step 4: Simplify right side
    78,786.20x = 4,869,596,569.80
  5. Step 5: Solve for x
    x = 4,869,596,569.80/78,786.20
  6. Step 6: Final answer
    x = 61,807.73

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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.