Home / 77,329.21-115,993.85-21,169.78

Finding the Fourth Proportional to 77,329.21, 115,993.85 and 21,169.78

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Solution

The fourth proportional to 77,329.21, 115,993.85 and 21,169.78 is: 31,754.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,329.21 : 115,993.85 = 21,169.78 : x
  2. Step 2: Convert to fraction form
    77,329.21/115,993.85 = 21,169.78/x
  3. Step 3: Cross multiply
    77,329.21x = 115,993.85 × 21,169.78
  4. Step 4: Simplify right side
    77,329.21x = 2,455,564,275.79
  5. Step 5: Solve for x
    x = 2,455,564,275.79/77,329.21
  6. Step 6: Final answer
    x = 31,754.68

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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.