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Finding the Fourth Proportional to 109,149.80, 163,692.30 and 42,551.60

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Solution

The fourth proportional to 109,149.80, 163,692.30 and 42,551.60 is: 63,814.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,149.80 : 163,692.30 = 42,551.60 : x
  2. Step 2: Convert to fraction form
    109,149.80/163,692.30 = 42,551.60/x
  3. Step 3: Cross multiply
    109,149.80x = 163,692.30 × 42,551.60
  4. Step 4: Simplify right side
    109,149.80x = 6,965,369,272.68
  5. Step 5: Solve for x
    x = 6,965,369,272.68/109,149.80
  6. Step 6: Final answer
    x = 63,814.77

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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.