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Finding the Fourth Proportional to 139,910.80, 209,866.20 and 134,467.60

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Solution

The fourth proportional to 139,910.80, 209,866.20 and 134,467.60 is: 201,701.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,910.80 : 209,866.20 = 134,467.60 : x
  2. Step 2: Convert to fraction form
    139,910.80/209,866.20 = 134,467.60/x
  3. Step 3: Cross multiply
    139,910.80x = 209,866.20 × 134,467.60
  4. Step 4: Simplify right side
    139,910.80x = 28,220,204,235.12
  5. Step 5: Solve for x
    x = 28,220,204,235.12/139,910.80
  6. Step 6: Final answer
    x = 201,701.40

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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.