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Finding the Fourth Proportional to 149,295.88, 206,028.48 and 81,312.96

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Solution

The fourth proportional to 149,295.88, 206,028.48 and 81,312.96 is: 112,211.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,295.88 : 206,028.48 = 81,312.96 : x
  2. Step 2: Convert to fraction form
    149,295.88/206,028.48 = 81,312.96/x
  3. Step 3: Cross multiply
    149,295.88x = 206,028.48 × 81,312.96
  4. Step 4: Simplify right side
    149,295.88x = 16,752,785,553.10
  5. Step 5: Solve for x
    x = 16,752,785,553.10/149,295.88
  6. Step 6: Final answer
    x = 112,211.97

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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.