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Finding the Fourth Proportional to 66,451.52, 99,640.49 and 45,415.31

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Solution

The fourth proportional to 66,451.52, 99,640.49 and 45,415.31 is: 68,097.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,451.52 : 99,640.49 = 45,415.31 : x
  2. Step 2: Convert to fraction form
    66,451.52/99,640.49 = 45,415.31/x
  3. Step 3: Cross multiply
    66,451.52x = 99,640.49 × 45,415.31
  4. Step 4: Simplify right side
    66,451.52x = 4,525,203,016.62
  5. Step 5: Solve for x
    x = 4,525,203,016.62/66,451.52
  6. Step 6: Final answer
    x = 68,097.81

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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.