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Finding the Fourth Proportional to 109,879.60, 164,819.40 and 108,713.20

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Solution

The fourth proportional to 109,879.60, 164,819.40 and 108,713.20 is: 163,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,879.60 : 164,819.40 = 108,713.20 : x
  2. Step 2: Convert to fraction form
    109,879.60/164,819.40 = 108,713.20/x
  3. Step 3: Cross multiply
    109,879.60x = 164,819.40 × 108,713.20
  4. Step 4: Simplify right side
    109,879.60x = 17,918,044,396.08
  5. Step 5: Solve for x
    x = 17,918,044,396.08/109,879.60
  6. Step 6: Final answer
    x = 163,069.80

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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.