Home / 128,399.03-177,247.41-76,734.36

Finding the Fourth Proportional to 128,399.03, 177,247.41 and 76,734.36

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Solution

The fourth proportional to 128,399.03, 177,247.41 and 76,734.36 is: 105,927.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,399.03 : 177,247.41 = 76,734.36 : x
  2. Step 2: Convert to fraction form
    128,399.03/177,247.41 = 76,734.36/x
  3. Step 3: Cross multiply
    128,399.03x = 177,247.41 × 76,734.36
  4. Step 4: Simplify right side
    128,399.03x = 13,600,966,568.01
  5. Step 5: Solve for x
    x = 13,600,966,568.01/128,399.03
  6. Step 6: Final answer
    x = 105,927.34

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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.