Home / 100,529.28-138,734.10-55,211.44

Finding the Fourth Proportional to 100,529.28, 138,734.10 and 55,211.44

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Solution

The fourth proportional to 100,529.28, 138,734.10 and 55,211.44 is: 76,193.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,529.28 : 138,734.10 = 55,211.44 : x
  2. Step 2: Convert to fraction form
    100,529.28/138,734.10 = 55,211.44/x
  3. Step 3: Cross multiply
    100,529.28x = 138,734.10 × 55,211.44
  4. Step 4: Simplify right side
    100,529.28x = 7,659,709,438.10
  5. Step 5: Solve for x
    x = 7,659,709,438.10/100,529.28
  6. Step 6: Final answer
    x = 76,193.82

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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.