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Finding the Fourth Proportional to 201,138.70, 301,708.05 and 131,154.70

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Solution

The fourth proportional to 201,138.70, 301,708.05 and 131,154.70 is: 196,732.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,138.70 : 301,708.05 = 131,154.70 : x
  2. Step 2: Convert to fraction form
    201,138.70/301,708.05 = 131,154.70/x
  3. Step 3: Cross multiply
    201,138.70x = 301,708.05 × 131,154.70
  4. Step 4: Simplify right side
    201,138.70x = 39,570,428,785.34
  5. Step 5: Solve for x
    x = 39,570,428,785.34/201,138.70
  6. Step 6: Final answer
    x = 196,732.05

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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.