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Finding the Fourth Proportional to 143,321.20, 214,981.80 and 43,476.55

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Solution

The fourth proportional to 143,321.20, 214,981.80 and 43,476.55 is: 65,214.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,321.20 : 214,981.80 = 43,476.55 : x
  2. Step 2: Convert to fraction form
    143,321.20/214,981.80 = 43,476.55/x
  3. Step 3: Cross multiply
    143,321.20x = 214,981.80 × 43,476.55
  4. Step 4: Simplify right side
    143,321.20x = 9,346,666,976.79
  5. Step 5: Solve for x
    x = 9,346,666,976.79/143,321.20
  6. Step 6: Final answer
    x = 65,214.83

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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.