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Finding the Fourth Proportional to 91,175.88, 125,919.72 and 69,433.05

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Solution

The fourth proportional to 91,175.88, 125,919.72 and 69,433.05 is: 95,891.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,175.88 : 125,919.72 = 69,433.05 : x
  2. Step 2: Convert to fraction form
    91,175.88/125,919.72 = 69,433.05/x
  3. Step 3: Cross multiply
    91,175.88x = 125,919.72 × 69,433.05
  4. Step 4: Simplify right side
    91,175.88x = 8,742,990,214.75
  5. Step 5: Solve for x
    x = 8,742,990,214.75/91,175.88
  6. Step 6: Final answer
    x = 95,891.48

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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.