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Finding the Fourth Proportional to 131,202.78, 181,063.83 and 74,622.30

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Solution

The fourth proportional to 131,202.78, 181,063.83 and 74,622.30 is: 102,981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,202.78 : 181,063.83 = 74,622.30 : x
  2. Step 2: Convert to fraction form
    131,202.78/181,063.83 = 74,622.30/x
  3. Step 3: Cross multiply
    131,202.78x = 181,063.83 × 74,622.30
  4. Step 4: Simplify right side
    131,202.78x = 13,511,399,441.41
  5. Step 5: Solve for x
    x = 13,511,399,441.41/131,202.78
  6. Step 6: Final answer
    x = 102,981.05

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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.