Home / 82,181.28-122,677.41-72,216.78

Finding the Fourth Proportional to 82,181.28, 122,677.41 and 72,216.78

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Solution

The fourth proportional to 82,181.28, 122,677.41 and 72,216.78 is: 107,802.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,181.28 : 122,677.41 = 72,216.78 : x
  2. Step 2: Convert to fraction form
    82,181.28/122,677.41 = 72,216.78/x
  3. Step 3: Cross multiply
    82,181.28x = 122,677.41 × 72,216.78
  4. Step 4: Simplify right side
    82,181.28x = 8,859,367,528.94
  5. Step 5: Solve for x
    x = 8,859,367,528.94/82,181.28
  6. Step 6: Final answer
    x = 107,802.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.