Home / 100,660.56-138,911.85-55,343.18

Finding the Fourth Proportional to 100,660.56, 138,911.85 and 55,343.18

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Solution

The fourth proportional to 100,660.56, 138,911.85 and 55,343.18 is: 76,373.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,660.56 : 138,911.85 = 55,343.18 : x
  2. Step 2: Convert to fraction form
    100,660.56/138,911.85 = 55,343.18/x
  3. Step 3: Cross multiply
    100,660.56x = 138,911.85 × 55,343.18
  4. Step 4: Simplify right side
    100,660.56x = 7,687,822,824.12
  5. Step 5: Solve for x
    x = 7,687,822,824.12/100,660.56
  6. Step 6: Final answer
    x = 76,373.73

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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.