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Finding the Fourth Proportional to 68,877.72, 103,278.92 and 21,480.14

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Solution

The fourth proportional to 68,877.72, 103,278.92 and 21,480.14 is: 32,208.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,877.72 : 103,278.92 = 21,480.14 : x
  2. Step 2: Convert to fraction form
    68,877.72/103,278.92 = 21,480.14/x
  3. Step 3: Cross multiply
    68,877.72x = 103,278.92 × 21,480.14
  4. Step 4: Simplify right side
    68,877.72x = 2,218,445,811.45
  5. Step 5: Solve for x
    x = 2,218,445,811.45/68,877.72
  6. Step 6: Final answer
    x = 32,208.47

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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.