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Finding the Fourth Proportional to 48,643.81, 67,102.92 and 39,579.31

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Solution

The fourth proportional to 48,643.81, 67,102.92 and 39,579.31 is: 54,598.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,643.81 : 67,102.92 = 39,579.31 : x
  2. Step 2: Convert to fraction form
    48,643.81/67,102.92 = 39,579.31/x
  3. Step 3: Cross multiply
    48,643.81x = 67,102.92 × 39,579.31
  4. Step 4: Simplify right side
    48,643.81x = 2,655,887,272.59
  5. Step 5: Solve for x
    x = 2,655,887,272.59/48,643.81
  6. Step 6: Final answer
    x = 54,598.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.