Home / 143,171.28-197,576.52-79,509.20

Finding the Fourth Proportional to 143,171.28, 197,576.52 and 79,509.20

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Solution

The fourth proportional to 143,171.28, 197,576.52 and 79,509.20 is: 109,722.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,171.28 : 197,576.52 = 79,509.20 : x
  2. Step 2: Convert to fraction form
    143,171.28/197,576.52 = 79,509.20/x
  3. Step 3: Cross multiply
    143,171.28x = 197,576.52 × 79,509.20
  4. Step 4: Simplify right side
    143,171.28x = 15,709,151,043.98
  5. Step 5: Solve for x
    x = 15,709,151,043.98/143,171.28
  6. Step 6: Final answer
    x = 109,722.78

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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.