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Finding the Fourth Proportional to 79,925.97, 119,826.99 and 51,786.57

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Solution

The fourth proportional to 79,925.97, 119,826.99 and 51,786.57 is: 77,639.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,925.97 : 119,826.99 = 51,786.57 : x
  2. Step 2: Convert to fraction form
    79,925.97/119,826.99 = 51,786.57/x
  3. Step 3: Cross multiply
    79,925.97x = 119,826.99 × 51,786.57
  4. Step 4: Simplify right side
    79,925.97x = 6,205,428,805.52
  5. Step 5: Solve for x
    x = 6,205,428,805.52/79,925.97
  6. Step 6: Final answer
    x = 77,639.71

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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.