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Finding the Fourth Proportional to 53,234.40, 79,851.60 and 39,928.80

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Solution

The fourth proportional to 53,234.40, 79,851.60 and 39,928.80 is: 59,893.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,234.40 : 79,851.60 = 39,928.80 : x
  2. Step 2: Convert to fraction form
    53,234.40/79,851.60 = 39,928.80/x
  3. Step 3: Cross multiply
    53,234.40x = 79,851.60 × 39,928.80
  4. Step 4: Simplify right side
    53,234.40x = 3,188,378,566.08
  5. Step 5: Solve for x
    x = 3,188,378,566.08/53,234.40
  6. Step 6: Final answer
    x = 59,893.20

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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.