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Finding the Fourth Proportional to 235,781.75, 325,378.83 and 128,352.57

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Solution

The fourth proportional to 235,781.75, 325,378.83 and 128,352.57 is: 177,126.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,781.75 : 325,378.83 = 128,352.57 : x
  2. Step 2: Convert to fraction form
    235,781.75/325,378.83 = 128,352.57/x
  3. Step 3: Cross multiply
    235,781.75x = 325,378.83 × 128,352.57
  4. Step 4: Simplify right side
    235,781.75x = 41,763,209,054.09
  5. Step 5: Solve for x
    x = 41,763,209,054.09/235,781.75
  6. Step 6: Final answer
    x = 177,126.56

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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.