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Finding the Fourth Proportional to 143,874.09, 215,873.34 and 77,236.41

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Solution

The fourth proportional to 143,874.09, 215,873.34 and 77,236.41 is: 115,888.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,874.09 : 215,873.34 = 77,236.41 : x
  2. Step 2: Convert to fraction form
    143,874.09/215,873.34 = 77,236.41/x
  3. Step 3: Cross multiply
    143,874.09x = 215,873.34 × 77,236.41
  4. Step 4: Simplify right side
    143,874.09x = 16,673,281,796.31
  5. Step 5: Solve for x
    x = 16,673,281,796.31/143,874.09
  6. Step 6: Final answer
    x = 115,888.01

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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.