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Finding the Fourth Proportional to 100,643.20, 150,835.20 and 47,939.20

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Solution

The fourth proportional to 100,643.20, 150,835.20 and 47,939.20 is: 71,847.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,643.20 : 150,835.20 = 47,939.20 : x
  2. Step 2: Convert to fraction form
    100,643.20/150,835.20 = 47,939.20/x
  3. Step 3: Cross multiply
    100,643.20x = 150,835.20 × 47,939.20
  4. Step 4: Simplify right side
    100,643.20x = 7,230,918,819.84
  5. Step 5: Solve for x
    x = 7,230,918,819.84/100,643.20
  6. Step 6: Final answer
    x = 71,847.07

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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.