Home / 100,500.48-138,692.40-55,180.37

Finding the Fourth Proportional to 100,500.48, 138,692.40 and 55,180.37

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Solution

The fourth proportional to 100,500.48, 138,692.40 and 55,180.37 is: 76,149.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,500.48 : 138,692.40 = 55,180.37 : x
  2. Step 2: Convert to fraction form
    100,500.48/138,692.40 = 55,180.37/x
  3. Step 3: Cross multiply
    100,500.48x = 138,692.40 × 55,180.37
  4. Step 4: Simplify right side
    100,500.48x = 7,653,098,087.99
  5. Step 5: Solve for x
    x = 7,653,098,087.99/100,500.48
  6. Step 6: Final answer
    x = 76,149.87

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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.