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Finding the Fourth Proportional to 109,101.80, 163,620.30 and 42,503.60

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Solution

The fourth proportional to 109,101.80, 163,620.30 and 42,503.60 is: 63,742.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,101.80 : 163,620.30 = 42,503.60 : x
  2. Step 2: Convert to fraction form
    109,101.80/163,620.30 = 42,503.60/x
  3. Step 3: Cross multiply
    109,101.80x = 163,620.30 × 42,503.60
  4. Step 4: Simplify right side
    109,101.80x = 6,954,451,783.08
  5. Step 5: Solve for x
    x = 6,954,451,783.08/109,101.80
  6. Step 6: Final answer
    x = 63,742.78

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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.