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Finding the Fourth Proportional to 53,219.98, 79,840.77 and 19,939.42

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Solution

The fourth proportional to 53,219.98, 79,840.77 and 19,939.42 is: 29,913.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,219.98 : 79,840.77 = 19,939.42 : x
  2. Step 2: Convert to fraction form
    53,219.98/79,840.77 = 19,939.42/x
  3. Step 3: Cross multiply
    53,219.98x = 79,840.77 × 19,939.42
  4. Step 4: Simplify right side
    53,219.98x = 1,591,978,646.15
  5. Step 5: Solve for x
    x = 1,591,978,646.15/53,219.98
  6. Step 6: Final answer
    x = 29,913.18

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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.