Home / 86,949.21-130,231.14-66,810.45

Finding the Fourth Proportional to 86,949.21, 130,231.14 and 66,810.45

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Solution

The fourth proportional to 86,949.21, 130,231.14 and 66,810.45 is: 100,067.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,949.21 : 130,231.14 = 66,810.45 : x
  2. Step 2: Convert to fraction form
    86,949.21/130,231.14 = 66,810.45/x
  3. Step 3: Cross multiply
    86,949.21x = 130,231.14 × 66,810.45
  4. Step 4: Simplify right side
    86,949.21x = 8,700,801,067.41
  5. Step 5: Solve for x
    x = 8,700,801,067.41/86,949.21
  6. Step 6: Final answer
    x = 100,067.63

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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.