Home / 139,249.36-191,678.46-120,189.60

Finding the Fourth Proportional to 139,249.36, 191,678.46 and 120,189.60

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Solution

The fourth proportional to 139,249.36, 191,678.46 and 120,189.60 is: 165,442.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,249.36 : 191,678.46 = 120,189.60 : x
  2. Step 2: Convert to fraction form
    139,249.36/191,678.46 = 120,189.60/x
  3. Step 3: Cross multiply
    139,249.36x = 191,678.46 × 120,189.60
  4. Step 4: Simplify right side
    139,249.36x = 23,037,757,436.02
  5. Step 5: Solve for x
    x = 23,037,757,436.02/139,249.36
  6. Step 6: Final answer
    x = 165,442.47

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1.5x scale

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.