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Finding the Fourth Proportional to 69,218.48, 103,851.80 and 21,840.88

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Solution

The fourth proportional to 69,218.48, 103,851.80 and 21,840.88 is: 32,768.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,218.48 : 103,851.80 = 21,840.88 : x
  2. Step 2: Convert to fraction form
    69,218.48/103,851.80 = 21,840.88/x
  3. Step 3: Cross multiply
    69,218.48x = 103,851.80 × 21,840.88
  4. Step 4: Simplify right side
    69,218.48x = 2,268,214,701.58
  5. Step 5: Solve for x
    x = 2,268,214,701.58/69,218.48
  6. Step 6: Final answer
    x = 32,768.92

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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.