Home / 131,328,990.20-196,993,485.30-76,909,431.80

Finding the Fourth Proportional to 131,328,990.20, 196,993,485.30 and 76,909,431.80

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Solution

The fourth proportional to 131,328,990.20, 196,993,485.30 and 76,909,431.80 is: 115,364,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,328,990.20 : 196,993,485.30 = 76,909,431.80 : x
  2. Step 2: Convert to fraction form
    131,328,990.20/196,993,485.30 = 76,909,431.80/x
  3. Step 3: Cross multiply
    131,328,990.20x = 196,993,485.30 × 76,909,431.80
  4. Step 4: Simplify right side
    131,328,990.20x = 15,150,657,022,724,652
  5. Step 5: Solve for x
    x = 15,150,657,022,724,652/131,328,990.20
  6. Step 6: Final answer
    x = 115,364,147.70

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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.