Home / 81,678,004.20-122,367,707.10-66,449,485.80

Finding the Fourth Proportional to 81,678,004.20, 122,367,707.10 and 66,449,485.80

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Solution

The fourth proportional to 81,678,004.20, 122,367,707.10 and 66,449,485.80 is: 99,552,765.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678,004.20 : 122,367,707.10 = 66,449,485.80 : x
  2. Step 2: Convert to fraction form
    81,678,004.20/122,367,707.10 = 66,449,485.80/x
  3. Step 3: Cross multiply
    81,678,004.20x = 122,367,707.10 × 66,449,485.80
  4. Step 4: Simplify right side
    81,678,004.20x = 8,131,271,215,320,008
  5. Step 5: Solve for x
    x = 8,131,271,215,320,008/81,678,004.20
  6. Step 6: Final answer
    x = 99,552,765.70

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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.