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Finding the Fourth Proportional to 133,208.76, 199,640.90 and 99,665.65

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Solution

The fourth proportional to 133,208.76, 199,640.90 and 99,665.65 is: 149,369.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,208.76 : 199,640.90 = 99,665.65 : x
  2. Step 2: Convert to fraction form
    133,208.76/199,640.90 = 99,665.65/x
  3. Step 3: Cross multiply
    133,208.76x = 199,640.90 × 99,665.65
  4. Step 4: Simplify right side
    133,208.76x = 19,897,340,065.09
  5. Step 5: Solve for x
    x = 19,897,340,065.09/133,208.76
  6. Step 6: Final answer
    x = 149,369.61

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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.