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Finding the Fourth Proportional to 78,676.06, 117,942.72 and 39,245.26

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Solution

The fourth proportional to 78,676.06, 117,942.72 and 39,245.26 is: 58,832.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,676.06 : 117,942.72 = 39,245.26 : x
  2. Step 2: Convert to fraction form
    78,676.06/117,942.72 = 39,245.26/x
  3. Step 3: Cross multiply
    78,676.06x = 117,942.72 × 39,245.26
  4. Step 4: Simplify right side
    78,676.06x = 4,628,692,711.51
  5. Step 5: Solve for x
    x = 4,628,692,711.51/78,676.06
  6. Step 6: Final answer
    x = 58,832.29

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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.