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Finding the Fourth Proportional to 111,980.40, 167,970.60 and 80,487.60

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Solution

The fourth proportional to 111,980.40, 167,970.60 and 80,487.60 is: 120,731.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,980.40 : 167,970.60 = 80,487.60 : x
  2. Step 2: Convert to fraction form
    111,980.40/167,970.60 = 80,487.60/x
  3. Step 3: Cross multiply
    111,980.40x = 167,970.60 × 80,487.60
  4. Step 4: Simplify right side
    111,980.40x = 13,519,550,464.56
  5. Step 5: Solve for x
    x = 13,519,550,464.56/111,980.40
  6. Step 6: Final answer
    x = 120,731.40

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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.