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Finding the Fourth Proportional to 80,968.80, 121,395.60 and 31,029.60

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Solution

The fourth proportional to 80,968.80, 121,395.60 and 31,029.60 is: 46,522.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,968.80 : 121,395.60 = 31,029.60 : x
  2. Step 2: Convert to fraction form
    80,968.80/121,395.60 = 31,029.60/x
  3. Step 3: Cross multiply
    80,968.80x = 121,395.60 × 31,029.60
  4. Step 4: Simplify right side
    80,968.80x = 3,766,856,909.76
  5. Step 5: Solve for x
    x = 3,766,856,909.76/80,968.80
  6. Step 6: Final answer
    x = 46,522.33

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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.