Home / 143,781.00-198,415.11-78,370.38

Finding the Fourth Proportional to 143,781.00, 198,415.11 and 78,370.38

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Solution

The fourth proportional to 143,781.00, 198,415.11 and 78,370.38 is: 108,149.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,781.00 : 198,415.11 = 78,370.38 : x
  2. Step 2: Convert to fraction form
    143,781.00/198,415.11 = 78,370.38/x
  3. Step 3: Cross multiply
    143,781.00x = 198,415.11 × 78,370.38
  4. Step 4: Simplify right side
    143,781.00x = 15,549,867,862.33
  5. Step 5: Solve for x
    x = 15,549,867,862.33/143,781.00
  6. Step 6: Final answer
    x = 108,149.67

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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.