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Finding the Fourth Proportional to 213,076.05, 319,530.99 and 79,883.64

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Solution

The fourth proportional to 213,076.05, 319,530.99 and 79,883.64 is: 119,794.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,076.05 : 319,530.99 = 79,883.64 : x
  2. Step 2: Convert to fraction form
    213,076.05/319,530.99 = 79,883.64/x
  3. Step 3: Cross multiply
    213,076.05x = 319,530.99 × 79,883.64
  4. Step 4: Simplify right side
    213,076.05x = 25,525,298,574.00
  5. Step 5: Solve for x
    x = 25,525,298,574.00/213,076.05
  6. Step 6: Final answer
    x = 119,794.31

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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.