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Finding the Fourth Proportional to 217,865.19, 300,682.19 and 122,371.90

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Solution

The fourth proportional to 217,865.19, 300,682.19 and 122,371.90 is: 168,889.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,865.19 : 300,682.19 = 122,371.90 : x
  2. Step 2: Convert to fraction form
    217,865.19/300,682.19 = 122,371.90/x
  3. Step 3: Cross multiply
    217,865.19x = 300,682.19 × 122,371.90
  4. Step 4: Simplify right side
    217,865.19x = 36,795,050,886.46
  5. Step 5: Solve for x
    x = 36,795,050,886.46/217,865.19
  6. Step 6: Final answer
    x = 168,889.08

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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.