Home / 85,396.09-128,172.26-43,305.22

Finding the Fourth Proportional to 85,396.09, 128,172.26 and 43,305.22

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Solution

The fourth proportional to 85,396.09, 128,172.26 and 43,305.22 is: 64,997.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,396.09 : 128,172.26 = 43,305.22 : x
  2. Step 2: Convert to fraction form
    85,396.09/128,172.26 = 43,305.22/x
  3. Step 3: Cross multiply
    85,396.09x = 128,172.26 × 43,305.22
  4. Step 4: Simplify right side
    85,396.09x = 5,550,527,917.20
  5. Step 5: Solve for x
    x = 5,550,527,917.20/85,396.09
  6. Step 6: Final answer
    x = 64,997.45

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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.