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Finding the Fourth Proportional to 66,406.02, 99,640.11 and 33,128.66

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Solution

The fourth proportional to 66,406.02, 99,640.11 and 33,128.66 is: 49,708.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,406.02 : 99,640.11 = 33,128.66 : x
  2. Step 2: Convert to fraction form
    66,406.02/99,640.11 = 33,128.66/x
  3. Step 3: Cross multiply
    66,406.02x = 99,640.11 × 33,128.66
  4. Step 4: Simplify right side
    66,406.02x = 3,300,942,828.35
  5. Step 5: Solve for x
    x = 3,300,942,828.35/66,406.02
  6. Step 6: Final answer
    x = 49,708.49

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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.