Home / 100,615.30-138,851.49-55,297.56

Finding the Fourth Proportional to 100,615.30, 138,851.49 and 55,297.56

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Solution

The fourth proportional to 100,615.30, 138,851.49 and 55,297.56 is: 76,311.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,615.30 : 138,851.49 = 55,297.56 : x
  2. Step 2: Convert to fraction form
    100,615.30/138,851.49 = 55,297.56/x
  3. Step 3: Cross multiply
    100,615.30x = 138,851.49 × 55,297.56
  4. Step 4: Simplify right side
    100,615.30x = 7,678,148,599.36
  5. Step 5: Solve for x
    x = 7,678,148,599.36/100,615.30
  6. Step 6: Final answer
    x = 76,311.94

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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.