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Finding the Fourth Proportional to 66,624.33, 91,942.71 and 39,761.62

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Solution

The fourth proportional to 66,624.33, 91,942.71 and 39,761.62 is: 54,871.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,624.33 : 91,942.71 = 39,761.62 : x
  2. Step 2: Convert to fraction form
    66,624.33/91,942.71 = 39,761.62/x
  3. Step 3: Cross multiply
    66,624.33x = 91,942.71 × 39,761.62
  4. Step 4: Simplify right side
    66,624.33x = 3,655,791,096.79
  5. Step 5: Solve for x
    x = 3,655,791,096.79/66,624.33
  6. Step 6: Final answer
    x = 54,871.71

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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.