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Finding the Fourth Proportional to 147,181.20, 220,512.60 and 120,742.80

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Solution

The fourth proportional to 147,181.20, 220,512.60 and 120,742.80 is: 180,901.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,181.20 : 220,512.60 = 120,742.80 : x
  2. Step 2: Convert to fraction form
    147,181.20/220,512.60 = 120,742.80/x
  3. Step 3: Cross multiply
    147,181.20x = 220,512.60 × 120,742.80
  4. Step 4: Simplify right side
    147,181.20x = 26,625,308,759.28
  5. Step 5: Solve for x
    x = 26,625,308,759.28/147,181.20
  6. Step 6: Final answer
    x = 180,901.56

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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.