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Finding the Fourth Proportional to 131,245.88, 181,206.48 and 100,977.80

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Solution

The fourth proportional to 131,245.88, 181,206.48 and 100,977.80 is: 139,416.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,245.88 : 181,206.48 = 100,977.80 : x
  2. Step 2: Convert to fraction form
    131,245.88/181,206.48 = 100,977.80/x
  3. Step 3: Cross multiply
    131,245.88x = 181,206.48 × 100,977.80
  4. Step 4: Simplify right side
    131,245.88x = 18,297,831,696.14
  5. Step 5: Solve for x
    x = 18,297,831,696.14/131,245.88
  6. Step 6: Final answer
    x = 139,416.43

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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.