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Finding the Fourth Proportional to 154,391.92, 213,020.36 and 88,964.65

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Solution

The fourth proportional to 154,391.92, 213,020.36 and 88,964.65 is: 122,747.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,391.92 : 213,020.36 = 88,964.65 : x
  2. Step 2: Convert to fraction form
    154,391.92/213,020.36 = 88,964.65/x
  3. Step 3: Cross multiply
    154,391.92x = 213,020.36 × 88,964.65
  4. Step 4: Simplify right side
    154,391.92x = 18,951,282,274.25
  5. Step 5: Solve for x
    x = 18,951,282,274.25/154,391.92
  6. Step 6: Final answer
    x = 122,747.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.