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Finding the Fourth Proportional to 131,383.20, 197,103.60 and 42,621.60

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Solution

The fourth proportional to 131,383.20, 197,103.60 and 42,621.60 is: 63,941.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,383.20 : 197,103.60 = 42,621.60 : x
  2. Step 2: Convert to fraction form
    131,383.20/197,103.60 = 42,621.60/x
  3. Step 3: Cross multiply
    131,383.20x = 197,103.60 × 42,621.60
  4. Step 4: Simplify right side
    131,383.20x = 8,400,870,797.76
  5. Step 5: Solve for x
    x = 8,400,870,797.76/131,383.20
  6. Step 6: Final answer
    x = 63,941.74

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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.