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Finding the Fourth Proportional to 148,290, 204,640.20 and 81,223.44

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Solution

The fourth proportional to 148,290, 204,640.20 and 81,223.44 is: 112,088.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,290 : 204,640.20 = 81,223.44 : x
  2. Step 2: Convert to fraction form
    148,290/204,640.20 = 81,223.44/x
  3. Step 3: Cross multiply
    148,290x = 204,640.20 × 81,223.44
  4. Step 4: Simplify right side
    148,290x = 16,621,581,006.29
  5. Step 5: Solve for x
    x = 16,621,581,006.29/148,290
  6. Step 6: Final answer
    x = 112,088.35

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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.