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Finding the Fourth Proportional to 217,898.56, 300,700.19 and 122,405.32

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Solution

The fourth proportional to 217,898.56, 300,700.19 and 122,405.32 is: 168,919.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,898.56 : 300,700.19 = 122,405.32 : x
  2. Step 2: Convert to fraction form
    217,898.56/300,700.19 = 122,405.32/x
  3. Step 3: Cross multiply
    217,898.56x = 300,700.19 × 122,405.32
  4. Step 4: Simplify right side
    217,898.56x = 36,807,302,981.01
  5. Step 5: Solve for x
    x = 36,807,302,981.01/217,898.56
  6. Step 6: Final answer
    x = 168,919.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.