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Finding the Fourth Proportional to 66,404.50, 91,639.53 and 36,189.70

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Solution

The fourth proportional to 66,404.50, 91,639.53 and 36,189.70 is: 49,942.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,404.50 : 91,639.53 = 36,189.70 : x
  2. Step 2: Convert to fraction form
    66,404.50/91,639.53 = 36,189.70/x
  3. Step 3: Cross multiply
    66,404.50x = 91,639.53 × 36,189.70
  4. Step 4: Simplify right side
    66,404.50x = 3,316,407,098.84
  5. Step 5: Solve for x
    x = 3,316,407,098.84/66,404.50
  6. Step 6: Final answer
    x = 49,942.51

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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.