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Finding the Fourth Proportional to 143,843.96, 215,790.07 and 43,980.75

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Solution

The fourth proportional to 143,843.96, 215,790.07 and 43,980.75 is: 65,978.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,843.96 : 215,790.07 = 43,980.75 : x
  2. Step 2: Convert to fraction form
    143,843.96/215,790.07 = 43,980.75/x
  3. Step 3: Cross multiply
    143,843.96x = 215,790.07 × 43,980.75
  4. Step 4: Simplify right side
    143,843.96x = 9,490,609,121.15
  5. Step 5: Solve for x
    x = 9,490,609,121.15/143,843.96
  6. Step 6: Final answer
    x = 65,978.50

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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.