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Finding the Fourth Proportional to 54,225.70, 81,230.55 and 47,731.30

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Solution

The fourth proportional to 54,225.70, 81,230.55 and 47,731.30 is: 71,501.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,225.70 : 81,230.55 = 47,731.30 : x
  2. Step 2: Convert to fraction form
    54,225.70/81,230.55 = 47,731.30/x
  3. Step 3: Cross multiply
    54,225.70x = 81,230.55 × 47,731.30
  4. Step 4: Simplify right side
    54,225.70x = 3,877,239,751.22
  5. Step 5: Solve for x
    x = 3,877,239,751.22/54,225.70
  6. Step 6: Final answer
    x = 71,501.88

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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.