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Finding the Fourth Proportional to 154,866.36, 213,740.46 and 87,819.96

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Solution

The fourth proportional to 154,866.36, 213,740.46 and 87,819.96 is: 121,205.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,866.36 : 213,740.46 = 87,819.96 : x
  2. Step 2: Convert to fraction form
    154,866.36/213,740.46 = 87,819.96/x
  3. Step 3: Cross multiply
    154,866.36x = 213,740.46 × 87,819.96
  4. Step 4: Simplify right side
    154,866.36x = 18,770,678,647.58
  5. Step 5: Solve for x
    x = 18,770,678,647.58/154,866.36
  6. Step 6: Final answer
    x = 121,205.66

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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.