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Finding the Fourth Proportional to 235,470.09, 324,947.09 and 128,040.20

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Solution

The fourth proportional to 235,470.09, 324,947.09 and 128,040.20 is: 176,694.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,470.09 : 324,947.09 = 128,040.20 : x
  2. Step 2: Convert to fraction form
    235,470.09/324,947.09 = 128,040.20/x
  3. Step 3: Cross multiply
    235,470.09x = 324,947.09 × 128,040.20
  4. Step 4: Simplify right side
    235,470.09x = 41,606,288,128.08
  5. Step 5: Solve for x
    x = 41,606,288,128.08/235,470.09
  6. Step 6: Final answer
    x = 176,694.58

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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.