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Finding the Fourth Proportional to 259,052.80, 388,579.20 and 72,064.30

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Solution

The fourth proportional to 259,052.80, 388,579.20 and 72,064.30 is: 108,096.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,052.80 : 388,579.20 = 72,064.30 : x
  2. Step 2: Convert to fraction form
    259,052.80/388,579.20 = 72,064.30/x
  3. Step 3: Cross multiply
    259,052.80x = 388,579.20 × 72,064.30
  4. Step 4: Simplify right side
    259,052.80x = 28,002,688,042.56
  5. Step 5: Solve for x
    x = 28,002,688,042.56/259,052.80
  6. Step 6: Final answer
    x = 108,096.45

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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.