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Finding the Fourth Proportional to 66,916.77, 100,390.01 and 20,166.27

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Solution

The fourth proportional to 66,916.77, 100,390.01 and 20,166.27 is: 30,253.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,916.77 : 100,390.01 = 20,166.27 : x
  2. Step 2: Convert to fraction form
    66,916.77/100,390.01 = 20,166.27/x
  3. Step 3: Cross multiply
    66,916.77x = 100,390.01 × 20,166.27
  4. Step 4: Simplify right side
    66,916.77x = 2,024,491,946.13
  5. Step 5: Solve for x
    x = 2,024,491,946.13/66,916.77
  6. Step 6: Final answer
    x = 30,253.88

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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.