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Finding the Fourth Proportional to 123,878.28, 170,952.92 and 67,289.64

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Solution

The fourth proportional to 123,878.28, 170,952.92 and 67,289.64 is: 92,860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,878.28 : 170,952.92 = 67,289.64 : x
  2. Step 2: Convert to fraction form
    123,878.28/170,952.92 = 67,289.64/x
  3. Step 3: Cross multiply
    123,878.28x = 170,952.92 × 67,289.64
  4. Step 4: Simplify right side
    123,878.28x = 11,503,360,443.75
  5. Step 5: Solve for x
    x = 11,503,360,443.75/123,878.28
  6. Step 6: Final answer
    x = 92,860.19

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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.