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Finding the Fourth Proportional to 220,994.60, 331,516.38 and 78,873.02

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Solution

The fourth proportional to 220,994.60, 331,516.38 and 78,873.02 is: 118,318.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,994.60 : 331,516.38 = 78,873.02 : x
  2. Step 2: Convert to fraction form
    220,994.60/331,516.38 = 78,873.02/x
  3. Step 3: Cross multiply
    220,994.60x = 331,516.38 × 78,873.02
  4. Step 4: Simplify right side
    220,994.60x = 26,147,698,070.07
  5. Step 5: Solve for x
    x = 26,147,698,070.07/220,994.60
  6. Step 6: Final answer
    x = 118,318.27

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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.