Home / 128,428.07-177,230.91-71,069.80

Finding the Fourth Proportional to 128,428.07, 177,230.91 and 71,069.80

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Solution

The fourth proportional to 128,428.07, 177,230.91 and 71,069.80 is: 98,076.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,428.07 : 177,230.91 = 71,069.80 : x
  2. Step 2: Convert to fraction form
    128,428.07/177,230.91 = 71,069.80/x
  3. Step 3: Cross multiply
    128,428.07x = 177,230.91 × 71,069.80
  4. Step 4: Simplify right side
    128,428.07x = 12,595,764,884.44
  5. Step 5: Solve for x
    x = 12,595,764,884.44/128,428.07
  6. Step 6: Final answer
    x = 98,076.41

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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.