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Finding the Fourth Proportional to 67,620.32, 101,441.40 and 28,181.40

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Solution

The fourth proportional to 67,620.32, 101,441.40 and 28,181.40 is: 42,276.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,620.32 : 101,441.40 = 28,181.40 : x
  2. Step 2: Convert to fraction form
    67,620.32/101,441.40 = 28,181.40/x
  3. Step 3: Cross multiply
    67,620.32x = 101,441.40 × 28,181.40
  4. Step 4: Simplify right side
    67,620.32x = 2,858,760,669.96
  5. Step 5: Solve for x
    x = 2,858,760,669.96/67,620.32
  6. Step 6: Final answer
    x = 42,276.65

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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.