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Finding the Fourth Proportional to 213,916.40, 320,874.60 and 108,940.40

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Solution

The fourth proportional to 213,916.40, 320,874.60 and 108,940.40 is: 163,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,916.40 : 320,874.60 = 108,940.40 : x
  2. Step 2: Convert to fraction form
    213,916.40/320,874.60 = 108,940.40/x
  3. Step 3: Cross multiply
    213,916.40x = 320,874.60 × 108,940.40
  4. Step 4: Simplify right side
    213,916.40x = 34,956,207,273.84
  5. Step 5: Solve for x
    x = 34,956,207,273.84/213,916.40
  6. Step 6: Final answer
    x = 163,410.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.