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Finding the Fourth Proportional to 143,796.15, 215,694.23 and 121,652.78

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Solution

The fourth proportional to 143,796.15, 215,694.23 and 121,652.78 is: 182,479.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,796.15 : 215,694.23 = 121,652.78 : x
  2. Step 2: Convert to fraction form
    143,796.15/215,694.23 = 121,652.78/x
  3. Step 3: Cross multiply
    143,796.15x = 215,694.23 × 121,652.78
  4. Step 4: Simplify right side
    143,796.15x = 26,239,801,022.72
  5. Step 5: Solve for x
    x = 26,239,801,022.72/143,796.15
  6. Step 6: Final answer
    x = 182,479.16

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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.