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Finding the Fourth Proportional to 217,919.60, 326,814.60 and 84,723.20

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Solution

The fourth proportional to 217,919.60, 326,814.60 and 84,723.20 is: 127,059.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,919.60 : 326,814.60 = 84,723.20 : x
  2. Step 2: Convert to fraction form
    217,919.60/326,814.60 = 84,723.20/x
  3. Step 3: Cross multiply
    217,919.60x = 326,814.60 × 84,723.20
  4. Step 4: Simplify right side
    217,919.60x = 27,688,778,718.72
  5. Step 5: Solve for x
    x = 27,688,778,718.72/217,919.60
  6. Step 6: Final answer
    x = 127,059.61

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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.