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Finding the Fourth Proportional to 216,616.62, 298,930.98 and 121,123.56

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Solution

The fourth proportional to 216,616.62, 298,930.98 and 121,123.56 is: 167,150.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,616.62 : 298,930.98 = 121,123.56 : x
  2. Step 2: Convert to fraction form
    216,616.62/298,930.98 = 121,123.56/x
  3. Step 3: Cross multiply
    216,616.62x = 298,930.98 × 121,123.56
  4. Step 4: Simplify right side
    216,616.62x = 36,207,584,491.89
  5. Step 5: Solve for x
    x = 36,207,584,491.89/216,616.62
  6. Step 6: Final answer
    x = 167,150.54

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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.