Home / 143,619.28-198,165.60-86,997.76

Finding the Fourth Proportional to 143,619.28, 198,165.60 and 86,997.76

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Solution

The fourth proportional to 143,619.28, 198,165.60 and 86,997.76 is: 120,039.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,619.28 : 198,165.60 = 86,997.76 : x
  2. Step 2: Convert to fraction form
    143,619.28/198,165.60 = 86,997.76/x
  3. Step 3: Cross multiply
    143,619.28x = 198,165.60 × 86,997.76
  4. Step 4: Simplify right side
    143,619.28x = 17,239,963,309.06
  5. Step 5: Solve for x
    x = 17,239,963,309.06/143,619.28
  6. Step 6: Final answer
    x = 120,039.34

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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.