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Finding the Fourth Proportional to 120,617.62, 166,428.30 and 72,873.60

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Solution

The fourth proportional to 120,617.62, 166,428.30 and 72,873.60 is: 100,551.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,617.62 : 166,428.30 = 72,873.60 : x
  2. Step 2: Convert to fraction form
    120,617.62/166,428.30 = 72,873.60/x
  3. Step 3: Cross multiply
    120,617.62x = 166,428.30 × 72,873.60
  4. Step 4: Simplify right side
    120,617.62x = 12,128,229,362.88
  5. Step 5: Solve for x
    x = 12,128,229,362.88/120,617.62
  6. Step 6: Final answer
    x = 100,551.06

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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.