Home / 145,879.38-201,189.42-100,629.54

Finding the Fourth Proportional to 145,879.38, 201,189.42 and 100,629.54

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Solution

The fourth proportional to 145,879.38, 201,189.42 and 100,629.54 is: 138,783.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,879.38 : 201,189.42 = 100,629.54 : x
  2. Step 2: Convert to fraction form
    145,879.38/201,189.42 = 100,629.54/x
  3. Step 3: Cross multiply
    145,879.38x = 201,189.42 × 100,629.54
  4. Step 4: Simplify right side
    145,879.38x = 20,245,598,787.47
  5. Step 5: Solve for x
    x = 20,245,598,787.47/145,879.38
  6. Step 6: Final answer
    x = 138,783.14

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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.