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Finding the Fourth Proportional to 305,735.54, 458,135.73 and 128,145.74

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Solution

The fourth proportional to 305,735.54, 458,135.73 and 128,145.74 is: 192,022.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,735.54 : 458,135.73 = 128,145.74 : x
  2. Step 2: Convert to fraction form
    305,735.54/458,135.73 = 128,145.74/x
  3. Step 3: Cross multiply
    305,735.54x = 458,135.73 × 128,145.74
  4. Step 4: Simplify right side
    305,735.54x = 58,708,139,850.61
  5. Step 5: Solve for x
    x = 58,708,139,850.61/305,735.54
  6. Step 6: Final answer
    x = 192,022.62

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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.