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Finding the Fourth Proportional to 199,991.90, 299,987.87 and 80,103.29

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Solution

The fourth proportional to 199,991.90, 299,987.87 and 80,103.29 is: 120,154.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,991.90 : 299,987.87 = 80,103.29 : x
  2. Step 2: Convert to fraction form
    199,991.90/299,987.87 = 80,103.29/x
  3. Step 3: Cross multiply
    199,991.90x = 299,987.87 × 80,103.29
  4. Step 4: Simplify right side
    199,991.90x = 24,030,013,446.64
  5. Step 5: Solve for x
    x = 24,030,013,446.64/199,991.90
  6. Step 6: Final answer
    x = 120,154.93

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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.