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Finding the Fourth Proportional to 199,659.06, 299,623.05 and 81,351.68

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Solution

The fourth proportional to 199,659.06, 299,623.05 and 81,351.68 is: 122,082.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,659.06 : 299,623.05 = 81,351.68 : x
  2. Step 2: Convert to fraction form
    199,659.06/299,623.05 = 81,351.68/x
  3. Step 3: Cross multiply
    199,659.06x = 299,623.05 × 81,351.68
  4. Step 4: Simplify right side
    199,659.06x = 24,374,836,986.11
  5. Step 5: Solve for x
    x = 24,374,836,986.11/199,659.06
  6. Step 6: Final answer
    x = 122,082.30

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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.