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Finding the Fourth Proportional to 217,333.70, 299,920.30 and 121,840.41

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Solution

The fourth proportional to 217,333.70, 299,920.30 and 121,840.41 is: 168,139.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,333.70 : 299,920.30 = 121,840.41 : x
  2. Step 2: Convert to fraction form
    217,333.70/299,920.30 = 121,840.41/x
  3. Step 3: Cross multiply
    217,333.70x = 299,920.30 × 121,840.41
  4. Step 4: Simplify right side
    217,333.70x = 36,542,412,014.72
  5. Step 5: Solve for x
    x = 36,542,412,014.72/217,333.70
  6. Step 6: Final answer
    x = 168,139.65

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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.