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Finding the Fourth Proportional to 66,732.81, 92,082.17 and 39,869.61

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Solution

The fourth proportional to 66,732.81, 92,082.17 and 39,869.61 is: 55,014.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,732.81 : 92,082.17 = 39,869.61 : x
  2. Step 2: Convert to fraction form
    66,732.81/92,082.17 = 39,869.61/x
  3. Step 3: Cross multiply
    66,732.81x = 92,082.17 × 39,869.61
  4. Step 4: Simplify right side
    66,732.81x = 3,671,280,305.53
  5. Step 5: Solve for x
    x = 3,671,280,305.53/66,732.81
  6. Step 6: Final answer
    x = 55,014.62

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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.