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Finding the Fourth Proportional to 217,866.18, 300,685.59 and 122,380.14

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Solution

The fourth proportional to 217,866.18, 300,685.59 and 122,380.14 is: 168,901.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,866.18 : 300,685.59 = 122,380.14 : x
  2. Step 2: Convert to fraction form
    217,866.18/300,685.59 = 122,380.14/x
  3. Step 3: Cross multiply
    217,866.18x = 300,685.59 × 122,380.14
  4. Step 4: Simplify right side
    217,866.18x = 36,797,944,600.18
  5. Step 5: Solve for x
    x = 36,797,944,600.18/217,866.18
  6. Step 6: Final answer
    x = 168,901.59

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1.5x scale

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.