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Finding the Fourth Proportional to 201,142.20, 300,935.70 and 131,158.20

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Solution

The fourth proportional to 201,142.20, 300,935.70 and 131,158.20 is: 196,230.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,142.20 : 300,935.70 = 131,158.20 : x
  2. Step 2: Convert to fraction form
    201,142.20/300,935.70 = 131,158.20/x
  3. Step 3: Cross multiply
    201,142.20x = 300,935.70 × 131,158.20
  4. Step 4: Simplify right side
    201,142.20x = 39,470,184,727.74
  5. Step 5: Solve for x
    x = 39,470,184,727.74/201,142.20
  6. Step 6: Final answer
    x = 196,230.25

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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.