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Finding the Fourth Proportional to 201,139.20, 300,931.20 and 131,155.20

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Solution

The fourth proportional to 201,139.20, 300,931.20 and 131,155.20 is: 196,225.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,139.20 : 300,931.20 = 131,155.20 : x
  2. Step 2: Convert to fraction form
    201,139.20/300,931.20 = 131,155.20/x
  3. Step 3: Cross multiply
    201,139.20x = 300,931.20 × 131,155.20
  4. Step 4: Simplify right side
    201,139.20x = 39,468,691,722.24
  5. Step 5: Solve for x
    x = 39,468,691,722.24/201,139.20
  6. Step 6: Final answer
    x = 196,225.76

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1.5x scale

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.