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Finding the Fourth Proportional to 81,274.59, 122,521.05 and 75,855.69

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Solution

The fourth proportional to 81,274.59, 122,521.05 and 75,855.69 is: 114,352.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,274.59 : 122,521.05 = 75,855.69 : x
  2. Step 2: Convert to fraction form
    81,274.59/122,521.05 = 75,855.69/x
  3. Step 3: Cross multiply
    81,274.59x = 122,521.05 × 75,855.69
  4. Step 4: Simplify right side
    81,274.59x = 9,293,918,787.27
  5. Step 5: Solve for x
    x = 9,293,918,787.27/81,274.59
  6. Step 6: Final answer
    x = 114,352.08

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.