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Finding the Fourth Proportional to 68,989.92, 95,189.22 and 42,122.64

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Solution

The fourth proportional to 68,989.92, 95,189.22 and 42,122.64 is: 58,118.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,989.92 : 95,189.22 = 42,122.64 : x
  2. Step 2: Convert to fraction form
    68,989.92/95,189.22 = 42,122.64/x
  3. Step 3: Cross multiply
    68,989.92x = 95,189.22 × 42,122.64
  4. Step 4: Simplify right side
    68,989.92x = 4,009,621,245.94
  5. Step 5: Solve for x
    x = 4,009,621,245.94/68,989.92
  6. Step 6: Final answer
    x = 58,118.94

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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.