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Finding the Fourth Proportional to 53,153.20, 79,729.80 and 21,563.20

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Solution

The fourth proportional to 53,153.20, 79,729.80 and 21,563.20 is: 32,344.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,153.20 : 79,729.80 = 21,563.20 : x
  2. Step 2: Convert to fraction form
    53,153.20/79,729.80 = 21,563.20/x
  3. Step 3: Cross multiply
    53,153.20x = 79,729.80 × 21,563.20
  4. Step 4: Simplify right side
    53,153.20x = 1,719,229,623.36
  5. Step 5: Solve for x
    x = 1,719,229,623.36/53,153.20
  6. Step 6: Final answer
    x = 32,344.80

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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.