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Finding the Fourth Proportional to 79,873.90, 119,872.81 and 29,999.36

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Solution

The fourth proportional to 79,873.90, 119,872.81 and 29,999.36 is: 45,022.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,873.90 : 119,872.81 = 29,999.36 : x
  2. Step 2: Convert to fraction form
    79,873.90/119,872.81 = 29,999.36/x
  3. Step 3: Cross multiply
    79,873.90x = 119,872.81 × 29,999.36
  4. Step 4: Simplify right side
    79,873.90x = 3,596,107,918.58
  5. Step 5: Solve for x
    x = 3,596,107,918.58/79,873.90
  6. Step 6: Final answer
    x = 45,022.32

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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.