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Finding the Fourth Proportional to 203,020.70, 304,617.45 and 128,198.30

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Solution

The fourth proportional to 203,020.70, 304,617.45 and 128,198.30 is: 192,352.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,020.70 : 304,617.45 = 128,198.30 : x
  2. Step 2: Convert to fraction form
    203,020.70/304,617.45 = 128,198.30/x
  3. Step 3: Cross multiply
    203,020.70x = 304,617.45 × 128,198.30
  4. Step 4: Simplify right side
    203,020.70x = 39,051,439,240.34
  5. Step 5: Solve for x
    x = 39,051,439,240.34/203,020.70
  6. Step 6: Final answer
    x = 192,352.01

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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.