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Finding the Fourth Proportional to 74,485.56, 111,728.88 and 21,895.80

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Solution

The fourth proportional to 74,485.56, 111,728.88 and 21,895.80 is: 32,843.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,485.56 : 111,728.88 = 21,895.80 : x
  2. Step 2: Convert to fraction form
    74,485.56/111,728.88 = 21,895.80/x
  3. Step 3: Cross multiply
    74,485.56x = 111,728.88 × 21,895.80
  4. Step 4: Simplify right side
    74,485.56x = 2,446,393,210.70
  5. Step 5: Solve for x
    x = 2,446,393,210.70/74,485.56
  6. Step 6: Final answer
    x = 32,843.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.