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Finding the Fourth Proportional to 202,391.60, 303,781.80 and 102,664.40

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Solution

The fourth proportional to 202,391.60, 303,781.80 and 102,664.40 is: 154,095.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,391.60 : 303,781.80 = 102,664.40 : x
  2. Step 2: Convert to fraction form
    202,391.60/303,781.80 = 102,664.40/x
  3. Step 3: Cross multiply
    202,391.60x = 303,781.80 × 102,664.40
  4. Step 4: Simplify right side
    202,391.60x = 31,187,576,227.92
  5. Step 5: Solve for x
    x = 31,187,576,227.92/202,391.60
  6. Step 6: Final answer
    x = 154,095.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.