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Finding the Fourth Proportional to 217,389.96, 299,993.49 and 121,894.56

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Solution

The fourth proportional to 217,389.96, 299,993.49 and 121,894.56 is: 168,211.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,389.96 : 299,993.49 = 121,894.56 : x
  2. Step 2: Convert to fraction form
    217,389.96/299,993.49 = 121,894.56/x
  3. Step 3: Cross multiply
    217,389.96x = 299,993.49 × 121,894.56
  4. Step 4: Simplify right side
    217,389.96x = 36,567,574,466.41
  5. Step 5: Solve for x
    x = 36,567,574,466.41/217,389.96
  6. Step 6: Final answer
    x = 168,211.88

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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.