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Finding the Fourth Proportional to 128,228.47, 192,324.78 and 43,987.25

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Solution

The fourth proportional to 128,228.47, 192,324.78 and 43,987.25 is: 65,974.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,228.47 : 192,324.78 = 43,987.25 : x
  2. Step 2: Convert to fraction form
    128,228.47/192,324.78 = 43,987.25/x
  3. Step 3: Cross multiply
    128,228.47x = 192,324.78 × 43,987.25
  4. Step 4: Simplify right side
    128,228.47x = 8,459,838,659.87
  5. Step 5: Solve for x
    x = 8,459,838,659.87/128,228.47
  6. Step 6: Final answer
    x = 65,974.73

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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.