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Finding the Fourth Proportional to 123,265.28, 170,106 and 66,676.70

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Solution

The fourth proportional to 123,265.28, 170,106 and 66,676.70 is: 92,013.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,265.28 : 170,106 = 66,676.70 : x
  2. Step 2: Convert to fraction form
    123,265.28/170,106 = 66,676.70/x
  3. Step 3: Cross multiply
    123,265.28x = 170,106 × 66,676.70
  4. Step 4: Simplify right side
    123,265.28x = 11,342,106,730.20
  5. Step 5: Solve for x
    x = 11,342,106,730.20/123,265.28
  6. Step 6: Final answer
    x = 92,013.80

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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.