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Finding the Fourth Proportional to 131,194.80, 196,840.80 and 42,451.20

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Solution

The fourth proportional to 131,194.80, 196,840.80 and 42,451.20 is: 63,692.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,194.80 : 196,840.80 = 42,451.20 : x
  2. Step 2: Convert to fraction form
    131,194.80/196,840.80 = 42,451.20/x
  3. Step 3: Cross multiply
    131,194.80x = 196,840.80 × 42,451.20
  4. Step 4: Simplify right side
    131,194.80x = 8,356,128,168.96
  5. Step 5: Solve for x
    x = 8,356,128,168.96/131,194.80
  6. Step 6: Final answer
    x = 63,692.53

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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.