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Finding the Fourth Proportional to 110,310.40, 165,076.80 and 76,873.60

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Solution

The fourth proportional to 110,310.40, 165,076.80 and 76,873.60 is: 115,039.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,310.40 : 165,076.80 = 76,873.60 : x
  2. Step 2: Convert to fraction form
    110,310.40/165,076.80 = 76,873.60/x
  3. Step 3: Cross multiply
    110,310.40x = 165,076.80 × 76,873.60
  4. Step 4: Simplify right side
    110,310.40x = 12,690,047,892.48
  5. Step 5: Solve for x
    x = 12,690,047,892.48/110,310.40
  6. Step 6: Final answer
    x = 115,039.45

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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.