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Finding the Fourth Proportional to 68,441.20, 102,661.80 and 55,999.60

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Solution

The fourth proportional to 68,441.20, 102,661.80 and 55,999.60 is: 83,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,441.20 : 102,661.80 = 55,999.60 : x
  2. Step 2: Convert to fraction form
    68,441.20/102,661.80 = 55,999.60/x
  3. Step 3: Cross multiply
    68,441.20x = 102,661.80 × 55,999.60
  4. Step 4: Simplify right side
    68,441.20x = 5,749,019,735.28
  5. Step 5: Solve for x
    x = 5,749,019,735.28/68,441.20
  6. Step 6: Final answer
    x = 83,999.40

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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.