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Finding the Fourth Proportional to 69,389, 95,756.84 and 39,581

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Solution

The fourth proportional to 69,389, 95,756.84 and 39,581 is: 54,621.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,389 : 95,756.84 = 39,581 : x
  2. Step 2: Convert to fraction form
    69,389/95,756.84 = 39,581/x
  3. Step 3: Cross multiply
    69,389x = 95,756.84 × 39,581
  4. Step 4: Simplify right side
    69,389x = 3,790,151,484.04
  5. Step 5: Solve for x
    x = 3,790,151,484.04/69,389
  6. Step 6: Final answer
    x = 54,621.79

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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.