Home / 100,857.36-139,201.82-58,415.88

Finding the Fourth Proportional to 100,857.36, 139,201.82 and 58,415.88

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Solution

The fourth proportional to 100,857.36, 139,201.82 and 58,415.88 is: 80,624.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,857.36 : 139,201.82 = 58,415.88 : x
  2. Step 2: Convert to fraction form
    100,857.36/139,201.82 = 58,415.88/x
  3. Step 3: Cross multiply
    100,857.36x = 139,201.82 × 58,415.88
  4. Step 4: Simplify right side
    100,857.36x = 8,131,596,812.90
  5. Step 5: Solve for x
    x = 8,131,596,812.90/100,857.36
  6. Step 6: Final answer
    x = 80,624.72

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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.