Home / 80,415,128.80-120,622,693.20-67,022,815.60

Finding the Fourth Proportional to 80,415,128.80, 120,622,693.20 and 67,022,815.60

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Solution

The fourth proportional to 80,415,128.80, 120,622,693.20 and 67,022,815.60 is: 100,534,223.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,415,128.80 : 120,622,693.20 = 67,022,815.60 : x
  2. Step 2: Convert to fraction form
    80,415,128.80/120,622,693.20 = 67,022,815.60/x
  3. Step 3: Cross multiply
    80,415,128.80x = 120,622,693.20 × 67,022,815.60
  4. Step 4: Simplify right side
    80,415,128.80x = 8,084,472,523,518,974
  5. Step 5: Solve for x
    x = 8,084,472,523,518,974/80,415,128.80
  6. Step 6: Final answer
    x = 100,534,223.40

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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.