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Finding the Fourth Proportional to 217,861.80, 326,841.30 and 84,730.20

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Solution

The fourth proportional to 217,861.80, 326,841.30 and 84,730.20 is: 127,114.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,861.80 : 326,841.30 = 84,730.20 : x
  2. Step 2: Convert to fraction form
    217,861.80/326,841.30 = 84,730.20/x
  3. Step 3: Cross multiply
    217,861.80x = 326,841.30 × 84,730.20
  4. Step 4: Simplify right side
    217,861.80x = 27,693,328,717.26
  5. Step 5: Solve for x
    x = 27,693,328,717.26/217,861.80
  6. Step 6: Final answer
    x = 127,114.20

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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.