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Finding the Fourth Proportional to 122,490.50, 169,045.25 and 68,049.05

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Solution

The fourth proportional to 122,490.50, 169,045.25 and 68,049.05 is: 93,912.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,490.50 : 169,045.25 = 68,049.05 : x
  2. Step 2: Convert to fraction form
    122,490.50/169,045.25 = 68,049.05/x
  3. Step 3: Cross multiply
    122,490.50x = 169,045.25 × 68,049.05
  4. Step 4: Simplify right side
    122,490.50x = 11,503,367,484.04
  5. Step 5: Solve for x
    x = 11,503,367,484.04/122,490.50
  6. Step 6: Final answer
    x = 93,912.33

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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.