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Finding the Fourth Proportional to 199,990.28, 299,985.44 and 138,054.44

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Solution

The fourth proportional to 199,990.28, 299,985.44 and 138,054.44 is: 207,081.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,990.28 : 299,985.44 = 138,054.44 : x
  2. Step 2: Convert to fraction form
    199,990.28/299,985.44 = 138,054.44/x
  3. Step 3: Cross multiply
    199,990.28x = 299,985.44 × 138,054.44
  4. Step 4: Simplify right side
    199,990.28x = 41,414,321,927.35
  5. Step 5: Solve for x
    x = 41,414,321,927.35/199,990.28
  6. Step 6: Final answer
    x = 207,081.67

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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.