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Finding the Fourth Proportional to 71,964.39, 99,291.64 and 69,126.75

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Solution

The fourth proportional to 71,964.39, 99,291.64 and 69,126.75 is: 95,376.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,964.39 : 99,291.64 = 69,126.75 : x
  2. Step 2: Convert to fraction form
    71,964.39/99,291.64 = 69,126.75/x
  3. Step 3: Cross multiply
    71,964.39x = 99,291.64 × 69,126.75
  4. Step 4: Simplify right side
    71,964.39x = 6,863,708,375.37
  5. Step 5: Solve for x
    x = 6,863,708,375.37/71,964.39
  6. Step 6: Final answer
    x = 95,376.45

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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.