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Finding the Fourth Proportional to 82,634.40, 123,951.60 and 81,856.80

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Solution

The fourth proportional to 82,634.40, 123,951.60 and 81,856.80 is: 122,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,634.40 : 123,951.60 = 81,856.80 : x
  2. Step 2: Convert to fraction form
    82,634.40/123,951.60 = 81,856.80/x
  3. Step 3: Cross multiply
    82,634.40x = 123,951.60 × 81,856.80
  4. Step 4: Simplify right side
    82,634.40x = 10,146,281,330.88
  5. Step 5: Solve for x
    x = 10,146,281,330.88/82,634.40
  6. Step 6: Final answer
    x = 122,785.20

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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.