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Finding the Fourth Proportional to 81,948.60, 122,922.90 and 29,359.80

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Solution

The fourth proportional to 81,948.60, 122,922.90 and 29,359.80 is: 44,039.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,948.60 : 122,922.90 = 29,359.80 : x
  2. Step 2: Convert to fraction form
    81,948.60/122,922.90 = 29,359.80/x
  3. Step 3: Cross multiply
    81,948.60x = 122,922.90 × 29,359.80
  4. Step 4: Simplify right side
    81,948.60x = 3,608,991,759.42
  5. Step 5: Solve for x
    x = 3,608,991,759.42/81,948.60
  6. Step 6: Final answer
    x = 44,039.70

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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.