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Finding the Fourth Proportional to 255,612.12, 383,439.78 and 68,633.88

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Solution

The fourth proportional to 255,612.12, 383,439.78 and 68,633.88 is: 102,956.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,612.12 : 383,439.78 = 68,633.88 : x
  2. Step 2: Convert to fraction form
    255,612.12/383,439.78 = 68,633.88/x
  3. Step 3: Cross multiply
    255,612.12x = 383,439.78 × 68,633.88
  4. Step 4: Simplify right side
    255,612.12x = 26,316,959,847.75
  5. Step 5: Solve for x
    x = 26,316,959,847.75/255,612.12
  6. Step 6: Final answer
    x = 102,956.62

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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.