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Finding the Fourth Proportional to 255,039.20, 381,975.60 and 130,234.40

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Solution

The fourth proportional to 255,039.20, 381,975.60 and 130,234.40 is: 195,053.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,039.20 : 381,975.60 = 130,234.40 : x
  2. Step 2: Convert to fraction form
    255,039.20/381,975.60 = 130,234.40/x
  3. Step 3: Cross multiply
    255,039.20x = 381,975.60 × 130,234.40
  4. Step 4: Simplify right side
    255,039.20x = 49,746,363,080.64
  5. Step 5: Solve for x
    x = 49,746,363,080.64/255,039.20
  6. Step 6: Final answer
    x = 195,053.79

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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.