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Finding the Fourth Proportional to 147,804.21, 203,970.60 and 80,736.21

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Solution

The fourth proportional to 147,804.21, 203,970.60 and 80,736.21 is: 111,416.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,804.21 : 203,970.60 = 80,736.21 : x
  2. Step 2: Convert to fraction form
    147,804.21/203,970.60 = 80,736.21/x
  3. Step 3: Cross multiply
    147,804.21x = 203,970.60 × 80,736.21
  4. Step 4: Simplify right side
    147,804.21x = 16,467,813,195.43
  5. Step 5: Solve for x
    x = 16,467,813,195.43/147,804.21
  6. Step 6: Final answer
    x = 111,416.40

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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.