Home / 255,986.40-383,979.60-130,015.20

Finding the Fourth Proportional to 255,986.40, 383,979.60 and 130,015.20

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Solution

The fourth proportional to 255,986.40, 383,979.60 and 130,015.20 is: 195,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,986.40 : 383,979.60 = 130,015.20 : x
  2. Step 2: Convert to fraction form
    255,986.40/383,979.60 = 130,015.20/x
  3. Step 3: Cross multiply
    255,986.40x = 383,979.60 × 130,015.20
  4. Step 4: Simplify right side
    255,986.40x = 49,923,184,489.92
  5. Step 5: Solve for x
    x = 49,923,184,489.92/255,986.40
  6. Step 6: Final answer
    x = 195,022.80

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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.