Home / 149,364.62-206,121.30-81,384.50

Finding the Fourth Proportional to 149,364.62, 206,121.30 and 81,384.50

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Solution

The fourth proportional to 149,364.62, 206,121.30 and 81,384.50 is: 112,309.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,364.62 : 206,121.30 = 81,384.50 : x
  2. Step 2: Convert to fraction form
    149,364.62/206,121.30 = 81,384.50/x
  3. Step 3: Cross multiply
    149,364.62x = 206,121.30 × 81,384.50
  4. Step 4: Simplify right side
    149,364.62x = 16,775,078,939.85
  5. Step 5: Solve for x
    x = 16,775,078,939.85/149,364.62
  6. Step 6: Final answer
    x = 112,309.59

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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.