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Finding the Fourth Proportional to 128,450.10, 192,675.15 and 123,201.30

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Solution

The fourth proportional to 128,450.10, 192,675.15 and 123,201.30 is: 184,801.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,450.10 : 192,675.15 = 123,201.30 : x
  2. Step 2: Convert to fraction form
    128,450.10/192,675.15 = 123,201.30/x
  3. Step 3: Cross multiply
    128,450.10x = 192,675.15 × 123,201.30
  4. Step 4: Simplify right side
    128,450.10x = 23,737,828,957.70
  5. Step 5: Solve for x
    x = 23,737,828,957.70/128,450.10
  6. Step 6: Final answer
    x = 184,801.95

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1.5x scale

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.