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Finding the Fourth Proportional to 199,479.95, 298,961.40 and 81,013.67

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Solution

The fourth proportional to 199,479.95, 298,961.40 and 81,013.67 is: 121,415.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,479.95 : 298,961.40 = 81,013.67 : x
  2. Step 2: Convert to fraction form
    199,479.95/298,961.40 = 81,013.67/x
  3. Step 3: Cross multiply
    199,479.95x = 298,961.40 × 81,013.67
  4. Step 4: Simplify right side
    199,479.95x = 24,219,959,049.87
  5. Step 5: Solve for x
    x = 24,219,959,049.87/199,479.95
  6. Step 6: Final answer
    x = 121,415.51

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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.