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Finding the Fourth Proportional to 321,549.75, 481,904.16 and 131,787.94

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Solution

The fourth proportional to 321,549.75, 481,904.16 and 131,787.94 is: 197,509.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,549.75 : 481,904.16 = 131,787.94 : x
  2. Step 2: Convert to fraction form
    321,549.75/481,904.16 = 131,787.94/x
  3. Step 3: Cross multiply
    321,549.75x = 481,904.16 × 131,787.94
  4. Step 4: Simplify right side
    321,549.75x = 63,509,156,523.83
  5. Step 5: Solve for x
    x = 63,509,156,523.83/321,549.75
  6. Step 6: Final answer
    x = 197,509.58

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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.