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Finding the Fourth Proportional to 87,762.88, 121,063.56 and 53,787.84

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Solution

The fourth proportional to 87,762.88, 121,063.56 and 53,787.84 is: 74,197.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,762.88 : 121,063.56 = 53,787.84 : x
  2. Step 2: Convert to fraction form
    87,762.88/121,063.56 = 53,787.84/x
  3. Step 3: Cross multiply
    87,762.88x = 121,063.56 × 53,787.84
  4. Step 4: Simplify right side
    87,762.88x = 6,511,747,395.11
  5. Step 5: Solve for x
    x = 6,511,747,395.11/87,762.88
  6. Step 6: Final answer
    x = 74,197.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.