Home / 128,586.08-177,469.81-76,899.80

Finding the Fourth Proportional to 128,586.08, 177,469.81 and 76,899.80

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Solution

The fourth proportional to 128,586.08, 177,469.81 and 76,899.80 is: 106,134.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,586.08 : 177,469.81 = 76,899.80 : x
  2. Step 2: Convert to fraction form
    128,586.08/177,469.81 = 76,899.80/x
  3. Step 3: Cross multiply
    128,586.08x = 177,469.81 × 76,899.80
  4. Step 4: Simplify right side
    128,586.08x = 13,647,392,895.04
  5. Step 5: Solve for x
    x = 13,647,392,895.04/128,586.08
  6. Step 6: Final answer
    x = 106,134.29

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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.