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Finding the Fourth Proportional to 148,369.92, 204,638.80 and 103,047.96

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Solution

The fourth proportional to 148,369.92, 204,638.80 and 103,047.96 is: 142,128.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,369.92 : 204,638.80 = 103,047.96 : x
  2. Step 2: Convert to fraction form
    148,369.92/204,638.80 = 103,047.96/x
  3. Step 3: Cross multiply
    148,369.92x = 204,638.80 × 103,047.96
  4. Step 4: Simplify right side
    148,369.92x = 21,087,610,876.85
  5. Step 5: Solve for x
    x = 21,087,610,876.85/148,369.92
  6. Step 6: Final answer
    x = 142,128.61

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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.