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Finding the Fourth Proportional to 139,939.20, 196,329.60 and 139,939.20

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Solution

The fourth proportional to 139,939.20, 196,329.60 and 139,939.20 is: 196,329.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,939.20 : 196,329.60 = 139,939.20 : x
  2. Step 2: Convert to fraction form
    139,939.20/196,329.60 = 139,939.20/x
  3. Step 3: Cross multiply
    139,939.20x = 196,329.60 × 139,939.20
  4. Step 4: Simplify right side
    139,939.20x = 27,474,207,160.32
  5. Step 5: Solve for x
    x = 27,474,207,160.32/139,939.20
  6. Step 6: Final answer
    x = 196,329.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.