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Finding the Fourth Proportional to 79,969.30, 119,954.10 and 20,804.87

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Solution

The fourth proportional to 79,969.30, 119,954.10 and 20,804.87 is: 31,207.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,969.30 : 119,954.10 = 20,804.87 : x
  2. Step 2: Convert to fraction form
    79,969.30/119,954.10 = 20,804.87/x
  3. Step 3: Cross multiply
    79,969.30x = 119,954.10 × 20,804.87
  4. Step 4: Simplify right side
    79,969.30x = 2,495,629,456.47
  5. Step 5: Solve for x
    x = 2,495,629,456.47/79,969.30
  6. Step 6: Final answer
    x = 31,207.34

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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.