Home / 77,169.36-115,758-21,769.68

Finding the Fourth Proportional to 77,169.36, 115,758 and 21,769.68

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Solution

The fourth proportional to 77,169.36, 115,758 and 21,769.68 is: 32,655.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,169.36 : 115,758 = 21,769.68 : x
  2. Step 2: Convert to fraction form
    77,169.36/115,758 = 21,769.68/x
  3. Step 3: Cross multiply
    77,169.36x = 115,758 × 21,769.68
  4. Step 4: Simplify right side
    77,169.36x = 2,520,014,617.44
  5. Step 5: Solve for x
    x = 2,520,014,617.44/77,169.36
  6. Step 6: Final answer
    x = 32,655.64

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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.