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Finding the Fourth Proportional to 120,672.87, 166,630.82 and 84,942.15

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Solution

The fourth proportional to 120,672.87, 166,630.82 and 84,942.15 is: 117,292.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,672.87 : 166,630.82 = 84,942.15 : x
  2. Step 2: Convert to fraction form
    120,672.87/166,630.82 = 84,942.15/x
  3. Step 3: Cross multiply
    120,672.87x = 166,630.82 × 84,942.15
  4. Step 4: Simplify right side
    120,672.87x = 14,153,979,682.35
  5. Step 5: Solve for x
    x = 14,153,979,682.35/120,672.87
  6. Step 6: Final answer
    x = 117,292.14

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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.