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Finding the Fourth Proportional to 216,640.27, 298,971.72 and 121,146.73

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Solution

The fourth proportional to 216,640.27, 298,971.72 and 121,146.73 is: 167,187.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,640.27 : 298,971.72 = 121,146.73 : x
  2. Step 2: Convert to fraction form
    216,640.27/298,971.72 = 121,146.73/x
  3. Step 3: Cross multiply
    216,640.27x = 298,971.72 × 121,146.73
  4. Step 4: Simplify right side
    216,640.27x = 36,219,446,240.48
  5. Step 5: Solve for x
    x = 36,219,446,240.48/216,640.27
  6. Step 6: Final answer
    x = 167,187.04

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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.