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Finding the Fourth Proportional to 79,809.69, 119,633.73 and 51,747.51

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Solution

The fourth proportional to 79,809.69, 119,633.73 and 51,747.51 is: 77,568.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,809.69 : 119,633.73 = 51,747.51 : x
  2. Step 2: Convert to fraction form
    79,809.69/119,633.73 = 51,747.51/x
  3. Step 3: Cross multiply
    79,809.69x = 119,633.73 × 51,747.51
  4. Step 4: Simplify right side
    79,809.69x = 6,190,747,639.51
  5. Step 5: Solve for x
    x = 6,190,747,639.51/79,809.69
  6. Step 6: Final answer
    x = 77,568.87

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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.