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Finding the Fourth Proportional to 128,404.20, 193,568.61 and 119,840.88

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Solution

The fourth proportional to 128,404.20, 193,568.61 and 119,840.88 is: 180,659.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,404.20 : 193,568.61 = 119,840.88 : x
  2. Step 2: Convert to fraction form
    128,404.20/193,568.61 = 119,840.88/x
  3. Step 3: Cross multiply
    128,404.20x = 193,568.61 × 119,840.88
  4. Step 4: Simplify right side
    128,404.20x = 23,197,432,562.78
  5. Step 5: Solve for x
    x = 23,197,432,562.78/128,404.20
  6. Step 6: Final answer
    x = 180,659.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.