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Finding the Fourth Proportional to 69,984.84, 105,037.92 and 36,728.40

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Solution

The fourth proportional to 69,984.84, 105,037.92 and 36,728.40 is: 55,124.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,984.84 : 105,037.92 = 36,728.40 : x
  2. Step 2: Convert to fraction form
    69,984.84/105,037.92 = 36,728.40/x
  3. Step 3: Cross multiply
    69,984.84x = 105,037.92 × 36,728.40
  4. Step 4: Simplify right side
    69,984.84x = 3,857,874,740.93
  5. Step 5: Solve for x
    x = 3,857,874,740.93/69,984.84
  6. Step 6: Final answer
    x = 55,124.43

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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.