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Finding the Fourth Proportional to 143,411.65, 215,128.86 and 43,580.56

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Solution

The fourth proportional to 143,411.65, 215,128.86 and 43,580.56 is: 65,374.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,411.65 : 215,128.86 = 43,580.56 : x
  2. Step 2: Convert to fraction form
    143,411.65/215,128.86 = 43,580.56/x
  3. Step 3: Cross multiply
    143,411.65x = 215,128.86 × 43,580.56
  4. Step 4: Simplify right side
    143,411.65x = 9,375,436,190.96
  5. Step 5: Solve for x
    x = 9,375,436,190.96/143,411.65
  6. Step 6: Final answer
    x = 65,374.30

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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.