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Finding the Fourth Proportional to 76,976.80, 115,270.80 and 73,477.60

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Solution

The fourth proportional to 76,976.80, 115,270.80 and 73,477.60 is: 110,030.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,976.80 : 115,270.80 = 73,477.60 : x
  2. Step 2: Convert to fraction form
    76,976.80/115,270.80 = 73,477.60/x
  3. Step 3: Cross multiply
    76,976.80x = 115,270.80 × 73,477.60
  4. Step 4: Simplify right side
    76,976.80x = 8,469,821,734.08
  5. Step 5: Solve for x
    x = 8,469,821,734.08/76,976.80
  6. Step 6: Final answer
    x = 110,030.84

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1.5x scale

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.