Home / 78,739.08-117,977.12-55,323.60

Finding the Fourth Proportional to 78,739.08, 117,977.12 and 55,323.60

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Solution

The fourth proportional to 78,739.08, 117,977.12 and 55,323.60 is: 82,893.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,739.08 : 117,977.12 = 55,323.60 : x
  2. Step 2: Convert to fraction form
    78,739.08/117,977.12 = 55,323.60/x
  3. Step 3: Cross multiply
    78,739.08x = 117,977.12 × 55,323.60
  4. Step 4: Simplify right side
    78,739.08x = 6,526,918,996.03
  5. Step 5: Solve for x
    x = 6,526,918,996.03/78,739.08
  6. Step 6: Final answer
    x = 82,893.01

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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.