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Finding the Fourth Proportional to 221,696.10, 305,940.60 and 121,094.10

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Solution

The fourth proportional to 221,696.10, 305,940.60 and 121,094.10 is: 167,109.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,696.10 : 305,940.60 = 121,094.10 : x
  2. Step 2: Convert to fraction form
    221,696.10/305,940.60 = 121,094.10/x
  3. Step 3: Cross multiply
    221,696.10x = 305,940.60 × 121,094.10
  4. Step 4: Simplify right side
    221,696.10x = 37,047,601,610.46
  5. Step 5: Solve for x
    x = 37,047,601,610.46/221,696.10
  6. Step 6: Final answer
    x = 167,109.85

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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.