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Finding the Fourth Proportional to 143,835.54, 215,826.21 and 96,990

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Solution

The fourth proportional to 143,835.54, 215,826.21 and 96,990 is: 145,534.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,835.54 : 215,826.21 = 96,990 : x
  2. Step 2: Convert to fraction form
    143,835.54/215,826.21 = 96,990/x
  3. Step 3: Cross multiply
    143,835.54x = 215,826.21 × 96,990
  4. Step 4: Simplify right side
    143,835.54x = 20,932,984,107.90
  5. Step 5: Solve for x
    x = 20,932,984,107.90/143,835.54
  6. Step 6: Final answer
    x = 145,534.16

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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.