Home / 78,912.26-118,415.55-28,997.40

Finding the Fourth Proportional to 78,912.26, 118,415.55 and 28,997.40

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Solution

The fourth proportional to 78,912.26, 118,415.55 and 28,997.40 is: 43,513.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,912.26 : 118,415.55 = 28,997.40 : x
  2. Step 2: Convert to fraction form
    78,912.26/118,415.55 = 28,997.40/x
  3. Step 3: Cross multiply
    78,912.26x = 118,415.55 × 28,997.40
  4. Step 4: Simplify right side
    78,912.26x = 3,433,743,622.37
  5. Step 5: Solve for x
    x = 3,433,743,622.37/78,912.26
  6. Step 6: Final answer
    x = 43,513.44

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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.