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Finding the Fourth Proportional to 204,961.60, 307,442.40 and 128,046.40

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Solution

The fourth proportional to 204,961.60, 307,442.40 and 128,046.40 is: 192,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,961.60 : 307,442.40 = 128,046.40 : x
  2. Step 2: Convert to fraction form
    204,961.60/307,442.40 = 128,046.40/x
  3. Step 3: Cross multiply
    204,961.60x = 307,442.40 × 128,046.40
  4. Step 4: Simplify right side
    204,961.60x = 39,366,892,527.36
  5. Step 5: Solve for x
    x = 39,366,892,527.36/204,961.60
  6. Step 6: Final answer
    x = 192,069.60

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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.