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Finding the Fourth Proportional to 149,691.01, 206,579.69 and 81,712.57

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Solution

The fourth proportional to 149,691.01, 206,579.69 and 81,712.57 is: 112,766.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,691.01 : 206,579.69 = 81,712.57 : x
  2. Step 2: Convert to fraction form
    149,691.01/206,579.69 = 81,712.57/x
  3. Step 3: Cross multiply
    149,691.01x = 206,579.69 × 81,712.57
  4. Step 4: Simplify right side
    149,691.01x = 16,880,157,379.70
  5. Step 5: Solve for x
    x = 16,880,157,379.70/149,691.01
  6. Step 6: Final answer
    x = 112,766.67

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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.