Home / 143,866.88-198,537.20-80,208.72

Finding the Fourth Proportional to 143,866.88, 198,537.20 and 80,208.72

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Solution

The fourth proportional to 143,866.88, 198,537.20 and 80,208.72 is: 110,688.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,866.88 : 198,537.20 = 80,208.72 : x
  2. Step 2: Convert to fraction form
    143,866.88/198,537.20 = 80,208.72/x
  3. Step 3: Cross multiply
    143,866.88x = 198,537.20 × 80,208.72
  4. Step 4: Simplify right side
    143,866.88x = 15,924,414,684.38
  5. Step 5: Solve for x
    x = 15,924,414,684.38/143,866.88
  6. Step 6: Final answer
    x = 110,688.54

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1.5x scale

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.