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Finding the Fourth Proportional to 201,123.20, 301,684.80 and 131,139.20

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Solution

The fourth proportional to 201,123.20, 301,684.80 and 131,139.20 is: 196,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,123.20 : 301,684.80 = 131,139.20 : x
  2. Step 2: Convert to fraction form
    201,123.20/301,684.80 = 131,139.20/x
  3. Step 3: Cross multiply
    201,123.20x = 301,684.80 × 131,139.20
  4. Step 4: Simplify right side
    201,123.20x = 39,562,703,324.16
  5. Step 5: Solve for x
    x = 39,562,703,324.16/201,123.20
  6. Step 6: Final answer
    x = 196,708.80

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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.