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Finding the Fourth Proportional to 82,354.20, 123,531.30 and 81,479.40

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Solution

The fourth proportional to 82,354.20, 123,531.30 and 81,479.40 is: 122,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,354.20 : 123,531.30 = 81,479.40 : x
  2. Step 2: Convert to fraction form
    82,354.20/123,531.30 = 81,479.40/x
  3. Step 3: Cross multiply
    82,354.20x = 123,531.30 × 81,479.40
  4. Step 4: Simplify right side
    82,354.20x = 10,065,256,205.22
  5. Step 5: Solve for x
    x = 10,065,256,205.22/82,354.20
  6. Step 6: Final answer
    x = 122,219.10

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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.