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Finding the Fourth Proportional to 81,397.10, 122,132.10 and 28,844.30

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Solution

The fourth proportional to 81,397.10, 122,132.10 and 28,844.30 is: 43,279.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,397.10 : 122,132.10 = 28,844.30 : x
  2. Step 2: Convert to fraction form
    81,397.10/122,132.10 = 28,844.30/x
  3. Step 3: Cross multiply
    81,397.10x = 122,132.10 × 28,844.30
  4. Step 4: Simplify right side
    81,397.10x = 3,522,814,932.03
  5. Step 5: Solve for x
    x = 3,522,814,932.03/81,397.10
  6. Step 6: Final answer
    x = 43,279.37

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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.