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Finding the Fourth Proportional to 84,049.98, 125,989.92 and 54,486.60

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Solution

The fourth proportional to 84,049.98, 125,989.92 and 54,486.60 is: 81,674.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,049.98 : 125,989.92 = 54,486.60 : x
  2. Step 2: Convert to fraction form
    84,049.98/125,989.92 = 54,486.60/x
  3. Step 3: Cross multiply
    84,049.98x = 125,989.92 × 54,486.60
  4. Step 4: Simplify right side
    84,049.98x = 6,864,762,375.07
  5. Step 5: Solve for x
    x = 6,864,762,375.07/84,049.98
  6. Step 6: Final answer
    x = 81,674.77

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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.