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Finding the Fourth Proportional to 80,978.58, 121,508.88 and 54,627.96

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Solution

The fourth proportional to 80,978.58, 121,508.88 and 54,627.96 is: 81,969.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,978.58 : 121,508.88 = 54,627.96 : x
  2. Step 2: Convert to fraction form
    80,978.58/121,508.88 = 54,627.96/x
  3. Step 3: Cross multiply
    80,978.58x = 121,508.88 × 54,627.96
  4. Step 4: Simplify right side
    80,978.58x = 6,637,782,606.27
  5. Step 5: Solve for x
    x = 6,637,782,606.27/80,978.58
  6. Step 6: Final answer
    x = 81,969.61

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.