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Finding the Fourth Proportional to 123,969.42, 171,078.39 and 67,380.75

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Solution

The fourth proportional to 123,969.42, 171,078.39 and 67,380.75 is: 92,985.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,969.42 : 171,078.39 = 67,380.75 : x
  2. Step 2: Convert to fraction form
    123,969.42/171,078.39 = 67,380.75/x
  3. Step 3: Cross multiply
    123,969.42x = 171,078.39 × 67,380.75
  4. Step 4: Simplify right side
    123,969.42x = 11,527,390,226.99
  5. Step 5: Solve for x
    x = 11,527,390,226.99/123,969.42
  6. Step 6: Final answer
    x = 92,985.76

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.