Home / 128,579.20-192,609.60-73,110.40

Finding the Fourth Proportional to 128,579.20, 192,609.60 and 73,110.40

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Solution

The fourth proportional to 128,579.20, 192,609.60 and 73,110.40 is: 109,518.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,579.20 : 192,609.60 = 73,110.40 : x
  2. Step 2: Convert to fraction form
    128,579.20/192,609.60 = 73,110.40/x
  3. Step 3: Cross multiply
    128,579.20x = 192,609.60 × 73,110.40
  4. Step 4: Simplify right side
    128,579.20x = 14,081,764,899.84
  5. Step 5: Solve for x
    x = 14,081,764,899.84/128,579.20
  6. Step 6: Final answer
    x = 109,518.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.