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Finding the Fourth Proportional to 201,138.20, 301,707.30 and 131,154.20

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Solution

The fourth proportional to 201,138.20, 301,707.30 and 131,154.20 is: 196,731.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,138.20 : 301,707.30 = 131,154.20 : x
  2. Step 2: Convert to fraction form
    201,138.20/301,707.30 = 131,154.20/x
  3. Step 3: Cross multiply
    201,138.20x = 301,707.30 × 131,154.20
  4. Step 4: Simplify right side
    201,138.20x = 39,570,179,565.66
  5. Step 5: Solve for x
    x = 39,570,179,565.66/201,138.20
  6. Step 6: Final answer
    x = 196,731.30

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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.