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Finding the Fourth Proportional to 148,326, 204,690 and 81,258

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Solution

The fourth proportional to 148,326, 204,690 and 81,258 is: 112,136.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,326 : 204,690 = 81,258 : x
  2. Step 2: Convert to fraction form
    148,326/204,690 = 81,258/x
  3. Step 3: Cross multiply
    148,326x = 204,690 × 81,258
  4. Step 4: Simplify right side
    148,326x = 16,632,700,020
  5. Step 5: Solve for x
    x = 16,632,700,020/148,326
  6. Step 6: Final answer
    x = 112,136.11

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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.