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Finding the Fourth Proportional to 78,991.44, 109,007.94 and 43,181.48

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Solution

The fourth proportional to 78,991.44, 109,007.94 and 43,181.48 is: 59,590.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,991.44 : 109,007.94 = 43,181.48 : x
  2. Step 2: Convert to fraction form
    78,991.44/109,007.94 = 43,181.48/x
  3. Step 3: Cross multiply
    78,991.44x = 109,007.94 × 43,181.48
  4. Step 4: Simplify right side
    78,991.44x = 4,707,124,180.95
  5. Step 5: Solve for x
    x = 4,707,124,180.95/78,991.44
  6. Step 6: Final answer
    x = 59,590.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.