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Finding the Fourth Proportional to 78,979.68, 118,498.80 and 36,883.44

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Solution

The fourth proportional to 78,979.68, 118,498.80 and 36,883.44 is: 55,338.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,979.68 : 118,498.80 = 36,883.44 : x
  2. Step 2: Convert to fraction form
    78,979.68/118,498.80 = 36,883.44/x
  3. Step 3: Cross multiply
    78,979.68x = 118,498.80 × 36,883.44
  4. Step 4: Simplify right side
    78,979.68x = 4,370,643,379.87
  5. Step 5: Solve for x
    x = 4,370,643,379.87/78,979.68
  6. Step 6: Final answer
    x = 55,338.83

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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.