Home / 143,629.20-215,443.80-80,643.60

Finding the Fourth Proportional to 143,629.20, 215,443.80 and 80,643.60

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Solution

The fourth proportional to 143,629.20, 215,443.80 and 80,643.60 is: 120,965.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,629.20 : 215,443.80 = 80,643.60 : x
  2. Step 2: Convert to fraction form
    143,629.20/215,443.80 = 80,643.60/x
  3. Step 3: Cross multiply
    143,629.20x = 215,443.80 × 80,643.60
  4. Step 4: Simplify right side
    143,629.20x = 17,374,163,629.68
  5. Step 5: Solve for x
    x = 17,374,163,629.68/143,629.20
  6. Step 6: Final answer
    x = 120,965.40

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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.