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Finding the Fourth Proportional to 213,069.73, 319,521.53 and 79,877.31

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Solution

The fourth proportional to 213,069.73, 319,521.53 and 79,877.31 is: 119,784.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,069.73 : 319,521.53 = 79,877.31 : x
  2. Step 2: Convert to fraction form
    213,069.73/319,521.53 = 79,877.31/x
  3. Step 3: Cross multiply
    213,069.73x = 319,521.53 × 79,877.31
  4. Step 4: Simplify right side
    213,069.73x = 25,522,521,301.98
  5. Step 5: Solve for x
    x = 25,522,521,301.98/213,069.73
  6. Step 6: Final answer
    x = 119,784.83

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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.