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Finding the Fourth Proportional to 69,161.45, 103,575.87 and 39,489.35

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Solution

The fourth proportional to 69,161.45, 103,575.87 and 39,489.35 is: 59,139.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,161.45 : 103,575.87 = 39,489.35 : x
  2. Step 2: Convert to fraction form
    69,161.45/103,575.87 = 39,489.35/x
  3. Step 3: Cross multiply
    69,161.45x = 103,575.87 × 39,489.35
  4. Step 4: Simplify right side
    69,161.45x = 4,090,143,264.11
  5. Step 5: Solve for x
    x = 4,090,143,264.11/69,161.45
  6. Step 6: Final answer
    x = 59,139.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.