Home / 78,068.44-117,089.32-28,138.60

Finding the Fourth Proportional to 78,068.44, 117,089.32 and 28,138.60

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Solution

The fourth proportional to 78,068.44, 117,089.32 and 28,138.60 is: 42,203.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,068.44 : 117,089.32 = 28,138.60 : x
  2. Step 2: Convert to fraction form
    78,068.44/117,089.32 = 28,138.60/x
  3. Step 3: Cross multiply
    78,068.44x = 117,089.32 × 28,138.60
  4. Step 4: Simplify right side
    78,068.44x = 3,294,729,539.75
  5. Step 5: Solve for x
    x = 3,294,729,539.75/78,068.44
  6. Step 6: Final answer
    x = 42,203.09

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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.