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Finding the Fourth Proportional to 101,979.92, 140,692.96 and 75,186.12

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Solution

The fourth proportional to 101,979.92, 140,692.96 and 75,186.12 is: 103,727.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,979.92 : 140,692.96 = 75,186.12 : x
  2. Step 2: Convert to fraction form
    101,979.92/140,692.96 = 75,186.12/x
  3. Step 3: Cross multiply
    101,979.92x = 140,692.96 × 75,186.12
  4. Step 4: Simplify right side
    101,979.92x = 10,578,157,773.72
  5. Step 5: Solve for x
    x = 10,578,157,773.72/101,979.92
  6. Step 6: Final answer
    x = 103,727.85

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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.