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Finding the Fourth Proportional to 122,086.85, 168,482.84 and 68,382.78

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Solution

The fourth proportional to 122,086.85, 168,482.84 and 68,382.78 is: 94,369.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,086.85 : 168,482.84 = 68,382.78 : x
  2. Step 2: Convert to fraction form
    122,086.85/168,482.84 = 68,382.78/x
  3. Step 3: Cross multiply
    122,086.85x = 168,482.84 × 68,382.78
  4. Step 4: Simplify right side
    122,086.85x = 11,521,324,955.49
  5. Step 5: Solve for x
    x = 11,521,324,955.49/122,086.85
  6. Step 6: Final answer
    x = 94,369.91

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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.