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Finding the Fourth Proportional to 143,289.76, 215,100.68 and 76,859.64

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Solution

The fourth proportional to 143,289.76, 215,100.68 and 76,859.64 is: 115,378.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,289.76 : 215,100.68 = 76,859.64 : x
  2. Step 2: Convert to fraction form
    143,289.76/215,100.68 = 76,859.64/x
  3. Step 3: Cross multiply
    143,289.76x = 215,100.68 × 76,859.64
  4. Step 4: Simplify right side
    143,289.76x = 16,532,560,828.56
  5. Step 5: Solve for x
    x = 16,532,560,828.56/143,289.76
  6. Step 6: Final answer
    x = 115,378.52

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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.