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Finding the Fourth Proportional to 128,013.96, 192,020.88 and 34,519.71

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Solution

The fourth proportional to 128,013.96, 192,020.88 and 34,519.71 is: 51,779.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,013.96 : 192,020.88 = 34,519.71 : x
  2. Step 2: Convert to fraction form
    128,013.96/192,020.88 = 34,519.71/x
  3. Step 3: Cross multiply
    128,013.96x = 192,020.88 × 34,519.71
  4. Step 4: Simplify right side
    128,013.96x = 6,628,505,091.54
  5. Step 5: Solve for x
    x = 6,628,505,091.54/128,013.96
  6. Step 6: Final answer
    x = 51,779.55

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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.