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Finding the Fourth Proportional to 102,739.20, 154,087.20 and 43,576.80

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Solution

The fourth proportional to 102,739.20, 154,087.20 and 43,576.80 is: 65,356.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,739.20 : 154,087.20 = 43,576.80 : x
  2. Step 2: Convert to fraction form
    102,739.20/154,087.20 = 43,576.80/x
  3. Step 3: Cross multiply
    102,739.20x = 154,087.20 × 43,576.80
  4. Step 4: Simplify right side
    102,739.20x = 6,714,627,096.96
  5. Step 5: Solve for x
    x = 6,714,627,096.96/102,739.20
  6. Step 6: Final answer
    x = 65,356.04

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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.