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Finding the Fourth Proportional to 79,878.44, 119,754.53 and 39,876.89

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Solution

The fourth proportional to 79,878.44, 119,754.53 and 39,876.89 is: 59,783.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,878.44 : 119,754.53 = 39,876.89 : x
  2. Step 2: Convert to fraction form
    79,878.44/119,754.53 = 39,876.89/x
  3. Step 3: Cross multiply
    79,878.44x = 119,754.53 × 39,876.89
  4. Step 4: Simplify right side
    79,878.44x = 4,775,437,421.65
  5. Step 5: Solve for x
    x = 4,775,437,421.65/79,878.44
  6. Step 6: Final answer
    x = 59,783.81

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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.