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Finding the Fourth Proportional to 148,176, 204,486.12 and 81,108

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Solution

The fourth proportional to 148,176, 204,486.12 and 81,108 is: 111,930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,176 : 204,486.12 = 81,108 : x
  2. Step 2: Convert to fraction form
    148,176/204,486.12 = 81,108/x
  3. Step 3: Cross multiply
    148,176x = 204,486.12 × 81,108
  4. Step 4: Simplify right side
    148,176x = 16,585,460,220.96
  5. Step 5: Solve for x
    x = 16,585,460,220.96/148,176
  6. Step 6: Final answer
    x = 111,930.81

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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.