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Finding the Fourth Proportional to 201,765.20, 301,870.20 and 131,781.20

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Solution

The fourth proportional to 201,765.20, 301,870.20 and 131,781.20 is: 197,163.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,765.20 : 301,870.20 = 131,781.20 : x
  2. Step 2: Convert to fraction form
    201,765.20/301,870.20 = 131,781.20/x
  3. Step 3: Cross multiply
    201,765.20x = 301,870.20 × 131,781.20
  4. Step 4: Simplify right side
    201,765.20x = 39,780,817,200.24
  5. Step 5: Solve for x
    x = 39,780,817,200.24/201,765.20
  6. Step 6: Final answer
    x = 197,163.92

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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.