Home / 77,326.20-115,989.30-21,166.20

Finding the Fourth Proportional to 77,326.20, 115,989.30 and 21,166.20

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Solution

The fourth proportional to 77,326.20, 115,989.30 and 21,166.20 is: 31,749.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,326.20 : 115,989.30 = 21,166.20 : x
  2. Step 2: Convert to fraction form
    77,326.20/115,989.30 = 21,166.20/x
  3. Step 3: Cross multiply
    77,326.20x = 115,989.30 × 21,166.20
  4. Step 4: Simplify right side
    77,326.20x = 2,455,052,721.66
  5. Step 5: Solve for x
    x = 2,455,052,721.66/77,326.20
  6. Step 6: Final answer
    x = 31,749.30

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Similar ratio
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1.5x scale

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.