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Finding the Fourth Proportional to 120,706.20, 166,736.88 and 92,761.20

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Solution

The fourth proportional to 120,706.20, 166,736.88 and 92,761.20 is: 128,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,706.20 : 166,736.88 = 92,761.20 : x
  2. Step 2: Convert to fraction form
    120,706.20/166,736.88 = 92,761.20/x
  3. Step 3: Cross multiply
    120,706.20x = 166,736.88 × 92,761.20
  4. Step 4: Simplify right side
    120,706.20x = 15,466,713,073.06
  5. Step 5: Solve for x
    x = 15,466,713,073.06/120,706.20
  6. Step 6: Final answer
    x = 128,135.20

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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.