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Finding the Fourth Proportional to 213,050.69, 319,563.50 and 79,919.80

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Solution

The fourth proportional to 213,050.69, 319,563.50 and 79,919.80 is: 119,875.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,050.69 : 319,563.50 = 79,919.80 : x
  2. Step 2: Convert to fraction form
    213,050.69/319,563.50 = 79,919.80/x
  3. Step 3: Cross multiply
    213,050.69x = 319,563.50 × 79,919.80
  4. Step 4: Simplify right side
    213,050.69x = 25,539,451,007.30
  5. Step 5: Solve for x
    x = 25,539,451,007.30/213,050.69
  6. Step 6: Final answer
    x = 119,875.00

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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.