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Finding the Fourth Proportional to 215,561.80, 323,201.88 and 103,238.38

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Solution

The fourth proportional to 215,561.80, 323,201.88 and 103,238.38 is: 154,790.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,561.80 : 323,201.88 = 103,238.38 : x
  2. Step 2: Convert to fraction form
    215,561.80/323,201.88 = 103,238.38/x
  3. Step 3: Cross multiply
    215,561.80x = 323,201.88 × 103,238.38
  4. Step 4: Simplify right side
    215,561.80x = 33,366,838,504.15
  5. Step 5: Solve for x
    x = 33,366,838,504.15/215,561.80
  6. Step 6: Final answer
    x = 154,790.13

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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.