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Finding the Fourth Proportional to 82,772.80, 124,418.40 and 81,217.60

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Solution

The fourth proportional to 82,772.80, 124,418.40 and 81,217.60 is: 122,080.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,772.80 : 124,418.40 = 81,217.60 : x
  2. Step 2: Convert to fraction form
    82,772.80/124,418.40 = 81,217.60/x
  3. Step 3: Cross multiply
    82,772.80x = 124,418.40 × 81,217.60
  4. Step 4: Simplify right side
    82,772.80x = 10,104,963,843.84
  5. Step 5: Solve for x
    x = 10,104,963,843.84/82,772.80
  6. Step 6: Final answer
    x = 122,080.73

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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.