Home / 143,705.78-198,313.90-83,311.52

Finding the Fourth Proportional to 143,705.78, 198,313.90 and 83,311.52

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Solution

The fourth proportional to 143,705.78, 198,313.90 and 83,311.52 is: 114,969.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,705.78 : 198,313.90 = 83,311.52 : x
  2. Step 2: Convert to fraction form
    143,705.78/198,313.90 = 83,311.52/x
  3. Step 3: Cross multiply
    143,705.78x = 198,313.90 × 83,311.52
  4. Step 4: Simplify right side
    143,705.78x = 16,521,832,446.13
  5. Step 5: Solve for x
    x = 16,521,832,446.13/143,705.78
  6. Step 6: Final answer
    x = 114,969.85

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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.