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Finding the Fourth Proportional to 131,729.80, 197,133.90 and 120,670.60

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Solution

The fourth proportional to 131,729.80, 197,133.90 and 120,670.60 is: 180,583.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,729.80 : 197,133.90 = 120,670.60 : x
  2. Step 2: Convert to fraction form
    131,729.80/197,133.90 = 120,670.60/x
  3. Step 3: Cross multiply
    131,729.80x = 197,133.90 × 120,670.60
  4. Step 4: Simplify right side
    131,729.80x = 23,788,265,993.34
  5. Step 5: Solve for x
    x = 23,788,265,993.34/131,729.80
  6. Step 6: Final answer
    x = 180,583.79

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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.