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Finding the Fourth Proportional to 120,356.67, 166,078.78 and 66,628.23

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Solution

The fourth proportional to 120,356.67, 166,078.78 and 66,628.23 is: 91,939.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,356.67 : 166,078.78 = 66,628.23 : x
  2. Step 2: Convert to fraction form
    120,356.67/166,078.78 = 66,628.23/x
  3. Step 3: Cross multiply
    120,356.67x = 166,078.78 × 66,628.23
  4. Step 4: Simplify right side
    120,356.67x = 11,065,535,151.96
  5. Step 5: Solve for x
    x = 11,065,535,151.96/120,356.67
  6. Step 6: Final answer
    x = 91,939.53

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1.5x scale

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.