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Finding the Fourth Proportional to 78,783.82, 118,120.39 and 28,857.44

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Solution

The fourth proportional to 78,783.82, 118,120.39 and 28,857.44 is: 43,265.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,783.82 : 118,120.39 = 28,857.44 : x
  2. Step 2: Convert to fraction form
    78,783.82/118,120.39 = 28,857.44/x
  3. Step 3: Cross multiply
    78,783.82x = 118,120.39 × 28,857.44
  4. Step 4: Simplify right side
    78,783.82x = 3,408,652,290.36
  5. Step 5: Solve for x
    x = 3,408,652,290.36/78,783.82
  6. Step 6: Final answer
    x = 43,265.89

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1.5x scale

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.