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Finding the Fourth Proportional to 235,792.20, 325,383.28 and 128,360

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Solution

The fourth proportional to 235,792.20, 325,383.28 and 128,360 is: 177,131.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,792.20 : 325,383.28 = 128,360 : x
  2. Step 2: Convert to fraction form
    235,792.20/325,383.28 = 128,360/x
  3. Step 3: Cross multiply
    235,792.20x = 325,383.28 × 128,360
  4. Step 4: Simplify right side
    235,792.20x = 41,766,197,820.80
  5. Step 5: Solve for x
    x = 41,766,197,820.80/235,792.20
  6. Step 6: Final answer
    x = 177,131.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.