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Finding the Fourth Proportional to 98,680.80, 148,021.20 and 48,741.60

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Solution

The fourth proportional to 98,680.80, 148,021.20 and 48,741.60 is: 73,112.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,680.80 : 148,021.20 = 48,741.60 : x
  2. Step 2: Convert to fraction form
    98,680.80/148,021.20 = 48,741.60/x
  3. Step 3: Cross multiply
    98,680.80x = 148,021.20 × 48,741.60
  4. Step 4: Simplify right side
    98,680.80x = 7,214,790,121.92
  5. Step 5: Solve for x
    x = 7,214,790,121.92/98,680.80
  6. Step 6: Final answer
    x = 73,112.40

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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.