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Finding the Fourth Proportional to 143,420.86, 215,131.14 and 43,580.68

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Solution

The fourth proportional to 143,420.86, 215,131.14 and 43,580.68 is: 65,370.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,420.86 : 215,131.14 = 43,580.68 : x
  2. Step 2: Convert to fraction form
    143,420.86/215,131.14 = 43,580.68/x
  3. Step 3: Cross multiply
    143,420.86x = 215,131.14 × 43,580.68
  4. Step 4: Simplify right side
    143,420.86x = 9,375,561,370.38
  5. Step 5: Solve for x
    x = 9,375,561,370.38/143,420.86
  6. Step 6: Final answer
    x = 65,370.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.