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Finding the Fourth Proportional to 213,081.04, 319,538.52 and 79,888.64

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Solution

The fourth proportional to 213,081.04, 319,538.52 and 79,888.64 is: 119,801.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,081.04 : 319,538.52 = 79,888.64 : x
  2. Step 2: Convert to fraction form
    213,081.04/319,538.52 = 79,888.64/x
  3. Step 3: Cross multiply
    213,081.04x = 319,538.52 × 79,888.64
  4. Step 4: Simplify right side
    213,081.04x = 25,527,497,790.41
  5. Step 5: Solve for x
    x = 25,527,497,790.41/213,081.04
  6. Step 6: Final answer
    x = 119,801.83

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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.