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Finding the Fourth Proportional to 203,702.20, 304,913.64 and 128,562.40

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Solution

The fourth proportional to 203,702.20, 304,913.64 and 128,562.40 is: 192,439.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,702.20 : 304,913.64 = 128,562.40 : x
  2. Step 2: Convert to fraction form
    203,702.20/304,913.64 = 128,562.40/x
  3. Step 3: Cross multiply
    203,702.20x = 304,913.64 × 128,562.40
  4. Step 4: Simplify right side
    203,702.20x = 39,200,429,351.14
  5. Step 5: Solve for x
    x = 39,200,429,351.14/203,702.20
  6. Step 6: Final answer
    x = 192,439.89

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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.