Home / 78,976.20-118,485.08-28,380.33

Finding the Fourth Proportional to 78,976.20, 118,485.08 and 28,380.33

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Solution

The fourth proportional to 78,976.20, 118,485.08 and 28,380.33 is: 42,577.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,976.20 : 118,485.08 = 28,380.33 : x
  2. Step 2: Convert to fraction form
    78,976.20/118,485.08 = 28,380.33/x
  3. Step 3: Cross multiply
    78,976.20x = 118,485.08 × 28,380.33
  4. Step 4: Simplify right side
    78,976.20x = 3,362,645,670.48
  5. Step 5: Solve for x
    x = 3,362,645,670.48/78,976.20
  6. Step 6: Final answer
    x = 42,577.96

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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.