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Finding the Fourth Proportional to 139,744.40, 209,616.60 and 133,620.80

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Solution

The fourth proportional to 139,744.40, 209,616.60 and 133,620.80 is: 200,431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,744.40 : 209,616.60 = 133,620.80 : x
  2. Step 2: Convert to fraction form
    139,744.40/209,616.60 = 133,620.80/x
  3. Step 3: Cross multiply
    139,744.40x = 209,616.60 × 133,620.80
  4. Step 4: Simplify right side
    139,744.40x = 28,009,137,785.28
  5. Step 5: Solve for x
    x = 28,009,137,785.28/139,744.40
  6. Step 6: Final answer
    x = 200,431.20

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1.5x scale

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.