Home / 143,022.11-197,376.21-78,493.61

Finding the Fourth Proportional to 143,022.11, 197,376.21 and 78,493.61

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Solution

The fourth proportional to 143,022.11, 197,376.21 and 78,493.61 is: 108,324.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,022.11 : 197,376.21 = 78,493.61 : x
  2. Step 2: Convert to fraction form
    143,022.11/197,376.21 = 78,493.61/x
  3. Step 3: Cross multiply
    143,022.11x = 197,376.21 × 78,493.61
  4. Step 4: Simplify right side
    143,022.11x = 15,492,771,744.46
  5. Step 5: Solve for x
    x = 15,492,771,744.46/143,022.11
  6. Step 6: Final answer
    x = 108,324.32

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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.