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Finding the Fourth Proportional to 81,921.80, 122,652.30 and 73,627.40

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Solution

The fourth proportional to 81,921.80, 122,652.30 and 73,627.40 is: 110,234.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,921.80 : 122,652.30 = 73,627.40 : x
  2. Step 2: Convert to fraction form
    81,921.80/122,652.30 = 73,627.40/x
  3. Step 3: Cross multiply
    81,921.80x = 122,652.30 × 73,627.40
  4. Step 4: Simplify right side
    81,921.80x = 9,030,569,953.02
  5. Step 5: Solve for x
    x = 9,030,569,953.02/81,921.80
  6. Step 6: Final answer
    x = 110,234.03

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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.