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Finding the Fourth Proportional to 81,743.60, 122,615.40 and 29,212.40

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Solution

The fourth proportional to 81,743.60, 122,615.40 and 29,212.40 is: 43,818.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,743.60 : 122,615.40 = 29,212.40 : x
  2. Step 2: Convert to fraction form
    81,743.60/122,615.40 = 29,212.40/x
  3. Step 3: Cross multiply
    81,743.60x = 122,615.40 × 29,212.40
  4. Step 4: Simplify right side
    81,743.60x = 3,581,890,110.96
  5. Step 5: Solve for x
    x = 3,581,890,110.96/81,743.60
  6. Step 6: Final answer
    x = 43,818.60

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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.