Home / 143,426.72-197,933.66-78,898.68

Finding the Fourth Proportional to 143,426.72, 197,933.66 and 78,898.68

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Solution

The fourth proportional to 143,426.72, 197,933.66 and 78,898.68 is: 108,882.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,426.72 : 197,933.66 = 78,898.68 : x
  2. Step 2: Convert to fraction form
    143,426.72/197,933.66 = 78,898.68/x
  3. Step 3: Cross multiply
    143,426.72x = 197,933.66 × 78,898.68
  4. Step 4: Simplify right side
    143,426.72x = 15,616,704,501.57
  5. Step 5: Solve for x
    x = 15,616,704,501.57/143,426.72
  6. Step 6: Final answer
    x = 108,882.81

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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.