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Finding the Fourth Proportional to 217,861.60, 326,727.60 and 84,665.20

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Solution

The fourth proportional to 217,861.60, 326,727.60 and 84,665.20 is: 126,972.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,861.60 : 326,727.60 = 84,665.20 : x
  2. Step 2: Convert to fraction form
    217,861.60/326,727.60 = 84,665.20/x
  3. Step 3: Cross multiply
    217,861.60x = 326,727.60 × 84,665.20
  4. Step 4: Simplify right side
    217,861.60x = 27,662,457,599.52
  5. Step 5: Solve for x
    x = 27,662,457,599.52/217,861.60
  6. Step 6: Final answer
    x = 126,972.62

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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.