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Finding the Fourth Proportional to 110,340.60, 165,340.80 and 82,128.30

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Solution

The fourth proportional to 110,340.60, 165,340.80 and 82,128.30 is: 123,065.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,340.60 : 165,340.80 = 82,128.30 : x
  2. Step 2: Convert to fraction form
    110,340.60/165,340.80 = 82,128.30/x
  3. Step 3: Cross multiply
    110,340.60x = 165,340.80 × 82,128.30
  4. Step 4: Simplify right side
    110,340.60x = 13,579,158,824.64
  5. Step 5: Solve for x
    x = 13,579,158,824.64/110,340.60
  6. Step 6: Final answer
    x = 123,065.84

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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.