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Finding the Fourth Proportional to 73,990.16, 110,986.30 and 21,399.80

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Solution

The fourth proportional to 73,990.16, 110,986.30 and 21,399.80 is: 32,100.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,990.16 : 110,986.30 = 21,399.80 : x
  2. Step 2: Convert to fraction form
    73,990.16/110,986.30 = 21,399.80/x
  3. Step 3: Cross multiply
    73,990.16x = 110,986.30 × 21,399.80
  4. Step 4: Simplify right side
    73,990.16x = 2,375,084,094.56
  5. Step 5: Solve for x
    x = 2,375,084,094.56/73,990.16
  6. Step 6: Final answer
    x = 32,100.00

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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.