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Finding the Fourth Proportional to 235,918.54, 325,571.46 and 128,490.67

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Solution

The fourth proportional to 235,918.54, 325,571.46 and 128,490.67 is: 177,319.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,918.54 : 325,571.46 = 128,490.67 : x
  2. Step 2: Convert to fraction form
    235,918.54/325,571.46 = 128,490.67/x
  3. Step 3: Cross multiply
    235,918.54x = 325,571.46 × 128,490.67
  4. Step 4: Simplify right side
    235,918.54x = 41,832,895,028.28
  5. Step 5: Solve for x
    x = 41,832,895,028.28/235,918.54
  6. Step 6: Final answer
    x = 177,319.23

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1.5x scale

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.