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Finding the Fourth Proportional to 213,145.20, 319,717.80 and 178,930.80

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Solution

The fourth proportional to 213,145.20, 319,717.80 and 178,930.80 is: 268,396.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,145.20 : 319,717.80 = 178,930.80 : x
  2. Step 2: Convert to fraction form
    213,145.20/319,717.80 = 178,930.80/x
  3. Step 3: Cross multiply
    213,145.20x = 319,717.80 × 178,930.80
  4. Step 4: Simplify right side
    213,145.20x = 57,207,361,728.24
  5. Step 5: Solve for x
    x = 57,207,361,728.24/213,145.20
  6. Step 6: Final answer
    x = 268,396.20

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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.