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Finding the Fourth Proportional to 213,179.20, 319,768.80 and 124,532.80

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Solution

The fourth proportional to 213,179.20, 319,768.80 and 124,532.80 is: 186,799.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,179.20 : 319,768.80 = 124,532.80 : x
  2. Step 2: Convert to fraction form
    213,179.20/319,768.80 = 124,532.80/x
  3. Step 3: Cross multiply
    213,179.20x = 319,768.80 × 124,532.80
  4. Step 4: Simplify right side
    213,179.20x = 39,821,704,016.64
  5. Step 5: Solve for x
    x = 39,821,704,016.64/213,179.20
  6. Step 6: Final answer
    x = 186,799.20

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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.