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Finding the Fourth Proportional to 120,762.70, 166,653.96 and 66,317.33

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Solution

The fourth proportional to 120,762.70, 166,653.96 and 66,317.33 is: 91,518.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,762.70 : 166,653.96 = 66,317.33 : x
  2. Step 2: Convert to fraction form
    120,762.70/166,653.96 = 66,317.33/x
  3. Step 3: Cross multiply
    120,762.70x = 166,653.96 × 66,317.33
  4. Step 4: Simplify right side
    120,762.70x = 11,052,045,829.07
  5. Step 5: Solve for x
    x = 11,052,045,829.07/120,762.70
  6. Step 6: Final answer
    x = 91,518.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.