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Finding the Fourth Proportional to 67,289.92, 100,935.12 and 30,310.72

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Solution

The fourth proportional to 67,289.92, 100,935.12 and 30,310.72 is: 45,466.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,289.92 : 100,935.12 = 30,310.72 : x
  2. Step 2: Convert to fraction form
    67,289.92/100,935.12 = 30,310.72/x
  3. Step 3: Cross multiply
    67,289.92x = 100,935.12 × 30,310.72
  4. Step 4: Simplify right side
    67,289.92x = 3,059,416,160.49
  5. Step 5: Solve for x
    x = 3,059,416,160.49/67,289.92
  6. Step 6: Final answer
    x = 45,466.19

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1.5x scale

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.