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Finding the Fourth Proportional to 213,070.73, 319,523.03 and 79,878.31

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Solution

The fourth proportional to 213,070.73, 319,523.03 and 79,878.31 is: 119,786.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,070.73 : 319,523.03 = 79,878.31 : x
  2. Step 2: Convert to fraction form
    213,070.73/319,523.03 = 79,878.31/x
  3. Step 3: Cross multiply
    213,070.73x = 319,523.03 × 79,878.31
  4. Step 4: Simplify right side
    213,070.73x = 25,522,959,642.48
  5. Step 5: Solve for x
    x = 25,522,959,642.48/213,070.73
  6. Step 6: Final answer
    x = 119,786.32

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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.