Home / 87,985.73-121,388.49-57,787.43

Finding the Fourth Proportional to 87,985.73, 121,388.49 and 57,787.43

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Solution

The fourth proportional to 87,985.73, 121,388.49 and 57,787.43 is: 79,725.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,985.73 : 121,388.49 = 57,787.43 : x
  2. Step 2: Convert to fraction form
    87,985.73/121,388.49 = 57,787.43/x
  3. Step 3: Cross multiply
    87,985.73x = 121,388.49 × 57,787.43
  4. Step 4: Simplify right side
    87,985.73x = 7,014,728,261.74
  5. Step 5: Solve for x
    x = 7,014,728,261.74/87,985.73
  6. Step 6: Final answer
    x = 79,725.75

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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.