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Finding the Fourth Proportional to 128,687.40, 193,059.90 and 49,794.60

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Solution

The fourth proportional to 128,687.40, 193,059.90 and 49,794.60 is: 74,703.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,687.40 : 193,059.90 = 49,794.60 : x
  2. Step 2: Convert to fraction form
    128,687.40/193,059.90 = 49,794.60/x
  3. Step 3: Cross multiply
    128,687.40x = 193,059.90 × 49,794.60
  4. Step 4: Simplify right side
    128,687.40x = 9,613,340,496.54
  5. Step 5: Solve for x
    x = 9,613,340,496.54/128,687.40
  6. Step 6: Final answer
    x = 74,703.04

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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.