Home / 100,987.55-139,233.24-82,771.20

Finding the Fourth Proportional to 100,987.55, 139,233.24 and 82,771.20

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Solution

The fourth proportional to 100,987.55, 139,233.24 and 82,771.20 is: 114,118.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,987.55 : 139,233.24 = 82,771.20 : x
  2. Step 2: Convert to fraction form
    100,987.55/139,233.24 = 82,771.20/x
  3. Step 3: Cross multiply
    100,987.55x = 139,233.24 × 82,771.20
  4. Step 4: Simplify right side
    100,987.55x = 11,524,502,354.69
  5. Step 5: Solve for x
    x = 11,524,502,354.69/100,987.55
  6. Step 6: Final answer
    x = 114,118.05

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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.