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Finding the Fourth Proportional to 79,505, 119,169.84 and 51,358.40

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Solution

The fourth proportional to 79,505, 119,169.84 and 51,358.40 is: 76,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,505 : 119,169.84 = 51,358.40 : x
  2. Step 2: Convert to fraction form
    79,505/119,169.84 = 51,358.40/x
  3. Step 3: Cross multiply
    79,505x = 119,169.84 × 51,358.40
  4. Step 4: Simplify right side
    79,505x = 6,120,372,310.66
  5. Step 5: Solve for x
    x = 6,120,372,310.66/79,505
  6. Step 6: Final answer
    x = 76,980.97

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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.