Home / 143,621.28-198,168.36-86,999.76

Finding the Fourth Proportional to 143,621.28, 198,168.36 and 86,999.76

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Solution

The fourth proportional to 143,621.28, 198,168.36 and 86,999.76 is: 120,042.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,621.28 : 198,168.36 = 86,999.76 : x
  2. Step 2: Convert to fraction form
    143,621.28/198,168.36 = 86,999.76/x
  3. Step 3: Cross multiply
    143,621.28x = 198,168.36 × 86,999.76
  4. Step 4: Simplify right side
    143,621.28x = 17,240,599,759.59
  5. Step 5: Solve for x
    x = 17,240,599,759.59/143,621.28
  6. Step 6: Final answer
    x = 120,042.10

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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.