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Finding the Fourth Proportional to 120,662.76, 166,538.87 and 69,683.79

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Solution

The fourth proportional to 120,662.76, 166,538.87 and 69,683.79 is: 96,177.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,662.76 : 166,538.87 = 69,683.79 : x
  2. Step 2: Convert to fraction form
    120,662.76/166,538.87 = 69,683.79/x
  3. Step 3: Cross multiply
    120,662.76x = 166,538.87 × 69,683.79
  4. Step 4: Simplify right side
    120,662.76x = 11,605,060,181.33
  5. Step 5: Solve for x
    x = 11,605,060,181.33/120,662.76
  6. Step 6: Final answer
    x = 96,177.64

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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.