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Finding the Fourth Proportional to 143,419.86, 215,129.64 and 43,579.68

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Solution

The fourth proportional to 143,419.86, 215,129.64 and 43,579.68 is: 65,369.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,419.86 : 215,129.64 = 43,579.68 : x
  2. Step 2: Convert to fraction form
    143,419.86/215,129.64 = 43,579.68/x
  3. Step 3: Cross multiply
    143,419.86x = 215,129.64 × 43,579.68
  4. Step 4: Simplify right side
    143,419.86x = 9,375,280,869.72
  5. Step 5: Solve for x
    x = 9,375,280,869.72/143,419.86
  6. Step 6: Final answer
    x = 65,369.47

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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.