Home / 100,500.21-138,692.12-55,182.47

Finding the Fourth Proportional to 100,500.21, 138,692.12 and 55,182.47

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Solution

The fourth proportional to 100,500.21, 138,692.12 and 55,182.47 is: 76,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,500.21 : 138,692.12 = 55,182.47 : x
  2. Step 2: Convert to fraction form
    100,500.21/138,692.12 = 55,182.47/x
  3. Step 3: Cross multiply
    100,500.21x = 138,692.12 × 55,182.47
  4. Step 4: Simplify right side
    100,500.21x = 7,653,372,781.76
  5. Step 5: Solve for x
    x = 7,653,372,781.76/100,500.21
  6. Step 6: Final answer
    x = 76,152.80

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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.