Home / 138,161.28-190,519.92-130,123.20

Finding the Fourth Proportional to 138,161.28, 190,519.92 and 130,123.20

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Solution

The fourth proportional to 138,161.28, 190,519.92 and 130,123.20 is: 179,435.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,161.28 : 190,519.92 = 130,123.20 : x
  2. Step 2: Convert to fraction form
    138,161.28/190,519.92 = 130,123.20/x
  3. Step 3: Cross multiply
    138,161.28x = 190,519.92 × 130,123.20
  4. Step 4: Simplify right side
    138,161.28x = 24,791,061,654.14
  5. Step 5: Solve for x
    x = 24,791,061,654.14/138,161.28
  6. Step 6: Final answer
    x = 179,435.67

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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.