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Finding the Fourth Proportional to 221,491.60, 331,841.40 and 134,779.60

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Solution

The fourth proportional to 221,491.60, 331,841.40 and 134,779.60 is: 201,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,491.60 : 331,841.40 = 134,779.60 : x
  2. Step 2: Convert to fraction form
    221,491.60/331,841.40 = 134,779.60/x
  3. Step 3: Cross multiply
    221,491.60x = 331,841.40 × 134,779.60
  4. Step 4: Simplify right side
    221,491.60x = 44,725,451,155.44
  5. Step 5: Solve for x
    x = 44,725,451,155.44/221,491.60
  6. Step 6: Final answer
    x = 201,928.43

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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.