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Finding the Fourth Proportional to 81,422.60, 122,133.90 and 68,300.60

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Solution

The fourth proportional to 81,422.60, 122,133.90 and 68,300.60 is: 102,450.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,422.60 : 122,133.90 = 68,300.60 : x
  2. Step 2: Convert to fraction form
    81,422.60/122,133.90 = 68,300.60/x
  3. Step 3: Cross multiply
    81,422.60x = 122,133.90 × 68,300.60
  4. Step 4: Simplify right side
    81,422.60x = 8,341,818,650.34
  5. Step 5: Solve for x
    x = 8,341,818,650.34/81,422.60
  6. Step 6: Final answer
    x = 102,450.90

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1.5x scale

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.