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Finding the Fourth Proportional to 67,060.64, 100,639.68 and 54,069.92

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Solution

The fourth proportional to 67,060.64, 100,639.68 and 54,069.92 is: 81,144.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,060.64 : 100,639.68 = 54,069.92 : x
  2. Step 2: Convert to fraction form
    67,060.64/100,639.68 = 54,069.92/x
  3. Step 3: Cross multiply
    67,060.64x = 100,639.68 × 54,069.92
  4. Step 4: Simplify right side
    67,060.64x = 5,441,579,446.43
  5. Step 5: Solve for x
    x = 5,441,579,446.43/67,060.64
  6. Step 6: Final answer
    x = 81,144.16

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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.