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Finding the Fourth Proportional to 70,798.92, 106,181.37 and 20,865.53

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Solution

The fourth proportional to 70,798.92, 106,181.37 and 20,865.53 is: 31,293.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,798.92 : 106,181.37 = 20,865.53 : x
  2. Step 2: Convert to fraction form
    70,798.92/106,181.37 = 20,865.53/x
  3. Step 3: Cross multiply
    70,798.92x = 106,181.37 × 20,865.53
  4. Step 4: Simplify right side
    70,798.92x = 2,215,530,030.27
  5. Step 5: Solve for x
    x = 2,215,530,030.27/70,798.92
  6. Step 6: Final answer
    x = 31,293.27

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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.