Home / 81,623.40-122,435.10-80,845.80

Finding the Fourth Proportional to 81,623.40, 122,435.10 and 80,845.80

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Solution

The fourth proportional to 81,623.40, 122,435.10 and 80,845.80 is: 121,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,623.40 : 122,435.10 = 80,845.80 : x
  2. Step 2: Convert to fraction form
    81,623.40/122,435.10 = 80,845.80/x
  3. Step 3: Cross multiply
    81,623.40x = 122,435.10 × 80,845.80
  4. Step 4: Simplify right side
    81,623.40x = 9,898,363,607.58
  5. Step 5: Solve for x
    x = 9,898,363,607.58/81,623.40
  6. Step 6: Final answer
    x = 121,268.70

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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.