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Finding the Fourth Proportional to 53,328.88, 79,978.74 and 20,046.39

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Solution

The fourth proportional to 53,328.88, 79,978.74 and 20,046.39 is: 30,064.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,328.88 : 79,978.74 = 20,046.39 : x
  2. Step 2: Convert to fraction form
    53,328.88/79,978.74 = 20,046.39/x
  3. Step 3: Cross multiply
    53,328.88x = 79,978.74 × 20,046.39
  4. Step 4: Simplify right side
    53,328.88x = 1,603,284,751.42
  5. Step 5: Solve for x
    x = 1,603,284,751.42/53,328.88
  6. Step 6: Final answer
    x = 30,064.10

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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.