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Finding the Fourth Proportional to 322,787.24, 484,180.90 and 86,130.80

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Solution

The fourth proportional to 322,787.24, 484,180.90 and 86,130.80 is: 129,196.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,787.24 : 484,180.90 = 86,130.80 : x
  2. Step 2: Convert to fraction form
    322,787.24/484,180.90 = 86,130.80/x
  3. Step 3: Cross multiply
    322,787.24x = 484,180.90 × 86,130.80
  4. Step 4: Simplify right side
    322,787.24x = 41,702,888,261.72
  5. Step 5: Solve for x
    x = 41,702,888,261.72/322,787.24
  6. Step 6: Final answer
    x = 129,196.21

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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.