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Finding the Fourth Proportional to 148,688.81, 205,190.76 and 80,705.80

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Solution

The fourth proportional to 148,688.81, 205,190.76 and 80,705.80 is: 111,374.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,688.81 : 205,190.76 = 80,705.80 : x
  2. Step 2: Convert to fraction form
    148,688.81/205,190.76 = 80,705.80/x
  3. Step 3: Cross multiply
    148,688.81x = 205,190.76 × 80,705.80
  4. Step 4: Simplify right side
    148,688.81x = 16,560,084,770.56
  5. Step 5: Solve for x
    x = 16,560,084,770.56/148,688.81
  6. Step 6: Final answer
    x = 111,374.11

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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.