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Finding the Fourth Proportional to 79,694.64, 109,941.68 and 51,409.44

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Solution

The fourth proportional to 79,694.64, 109,941.68 and 51,409.44 is: 70,921.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,694.64 : 109,941.68 = 51,409.44 : x
  2. Step 2: Convert to fraction form
    79,694.64/109,941.68 = 51,409.44/x
  3. Step 3: Cross multiply
    79,694.64x = 109,941.68 × 51,409.44
  4. Step 4: Simplify right side
    79,694.64x = 5,652,040,201.46
  5. Step 5: Solve for x
    x = 5,652,040,201.46/79,694.64
  6. Step 6: Final answer
    x = 70,921.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.