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Finding the Fourth Proportional to 212,735.80, 319,103.70 and 178,910.20

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Solution

The fourth proportional to 212,735.80, 319,103.70 and 178,910.20 is: 268,365.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,735.80 : 319,103.70 = 178,910.20 : x
  2. Step 2: Convert to fraction form
    212,735.80/319,103.70 = 178,910.20/x
  3. Step 3: Cross multiply
    212,735.80x = 319,103.70 × 178,910.20
  4. Step 4: Simplify right side
    212,735.80x = 57,090,906,787.74
  5. Step 5: Solve for x
    x = 57,090,906,787.74/212,735.80
  6. Step 6: Final answer
    x = 268,365.30

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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.