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Finding the Fourth Proportional to 120,999.60, 166,971.24 and 67,280.40

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Solution

The fourth proportional to 120,999.60, 166,971.24 and 67,280.40 is: 92,842.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,999.60 : 166,971.24 = 67,280.40 : x
  2. Step 2: Convert to fraction form
    120,999.60/166,971.24 = 67,280.40/x
  3. Step 3: Cross multiply
    120,999.60x = 166,971.24 × 67,280.40
  4. Step 4: Simplify right side
    120,999.60x = 11,233,891,815.70
  5. Step 5: Solve for x
    x = 11,233,891,815.70/120,999.60
  6. Step 6: Final answer
    x = 92,842.39

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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.