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Finding the Fourth Proportional to 125,667, 173,420.73 and 69,078.78

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Solution

The fourth proportional to 125,667, 173,420.73 and 69,078.78 is: 95,328.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,667 : 173,420.73 = 69,078.78 : x
  2. Step 2: Convert to fraction form
    125,667/173,420.73 = 69,078.78/x
  3. Step 3: Cross multiply
    125,667x = 173,420.73 × 69,078.78
  4. Step 4: Simplify right side
    125,667x = 11,979,692,455.11
  5. Step 5: Solve for x
    x = 11,979,692,455.11/125,667
  6. Step 6: Final answer
    x = 95,328.86

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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.