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Finding the Fourth Proportional to 120,063.87, 165,671.31 and 69,057.21

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Solution

The fourth proportional to 120,063.87, 165,671.31 and 69,057.21 is: 95,289.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,063.87 : 165,671.31 = 69,057.21 : x
  2. Step 2: Convert to fraction form
    120,063.87/165,671.31 = 69,057.21/x
  3. Step 3: Cross multiply
    120,063.87x = 165,671.31 × 69,057.21
  4. Step 4: Simplify right side
    120,063.87x = 11,440,797,358.32
  5. Step 5: Solve for x
    x = 11,440,797,358.32/120,063.87
  6. Step 6: Final answer
    x = 95,289.26

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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.