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Finding the Fourth Proportional to 79,326.40, 118,958.73 and 39,856

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Solution

The fourth proportional to 79,326.40, 118,958.73 and 39,856 is: 59,768.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,326.40 : 118,958.73 = 39,856 : x
  2. Step 2: Convert to fraction form
    79,326.40/118,958.73 = 39,856/x
  3. Step 3: Cross multiply
    79,326.40x = 118,958.73 × 39,856
  4. Step 4: Simplify right side
    79,326.40x = 4,741,219,142.88
  5. Step 5: Solve for x
    x = 4,741,219,142.88/79,326.40
  6. Step 6: Final answer
    x = 59,768.49

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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.