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Finding the Fourth Proportional to 128,380.96, 192,497.46 and 49,484.80

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Solution

The fourth proportional to 128,380.96, 192,497.46 and 49,484.80 is: 74,198.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,380.96 : 192,497.46 = 49,484.80 : x
  2. Step 2: Convert to fraction form
    128,380.96/192,497.46 = 49,484.80/x
  3. Step 3: Cross multiply
    128,380.96x = 192,497.46 × 49,484.80
  4. Step 4: Simplify right side
    128,380.96x = 9,525,698,308.61
  5. Step 5: Solve for x
    x = 9,525,698,308.61/128,380.96
  6. Step 6: Final answer
    x = 74,198.68

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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.