Home / 128,935.42-177,928.07-71,571.38

Finding the Fourth Proportional to 128,935.42, 177,928.07 and 71,571.38

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Solution

The fourth proportional to 128,935.42, 177,928.07 and 71,571.38 is: 98,766.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,935.42 : 177,928.07 = 71,571.38 : x
  2. Step 2: Convert to fraction form
    128,935.42/177,928.07 = 71,571.38/x
  3. Step 3: Cross multiply
    128,935.42x = 177,928.07 × 71,571.38
  4. Step 4: Simplify right side
    128,935.42x = 12,734,556,263.14
  5. Step 5: Solve for x
    x = 12,734,556,263.14/128,935.42
  6. Step 6: Final answer
    x = 98,766.94

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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.