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Finding the Fourth Proportional to 81,609.60, 122,414.40 and 44,284.80

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Solution

The fourth proportional to 81,609.60, 122,414.40 and 44,284.80 is: 66,427.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,609.60 : 122,414.40 = 44,284.80 : x
  2. Step 2: Convert to fraction form
    81,609.60/122,414.40 = 44,284.80/x
  3. Step 3: Cross multiply
    81,609.60x = 122,414.40 × 44,284.80
  4. Step 4: Simplify right side
    81,609.60x = 5,421,097,221.12
  5. Step 5: Solve for x
    x = 5,421,097,221.12/81,609.60
  6. Step 6: Final answer
    x = 66,427.20

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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.