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Finding the Fourth Proportional to 122,178.40, 168,604.80 and 68,465.60

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Solution

The fourth proportional to 122,178.40, 168,604.80 and 68,465.60 is: 94,481.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,178.40 : 168,604.80 = 68,465.60 : x
  2. Step 2: Convert to fraction form
    122,178.40/168,604.80 = 68,465.60/x
  3. Step 3: Cross multiply
    122,178.40x = 168,604.80 × 68,465.60
  4. Step 4: Simplify right side
    122,178.40x = 11,543,628,794.88
  5. Step 5: Solve for x
    x = 11,543,628,794.88/122,178.40
  6. Step 6: Final answer
    x = 94,481.75

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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.