Home / 100,459.44-138,634.20-55,137.72

Finding the Fourth Proportional to 100,459.44, 138,634.20 and 55,137.72

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Solution

The fourth proportional to 100,459.44, 138,634.20 and 55,137.72 is: 76,090.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,459.44 : 138,634.20 = 55,137.72 : x
  2. Step 2: Convert to fraction form
    100,459.44/138,634.20 = 55,137.72/x
  3. Step 3: Cross multiply
    100,459.44x = 138,634.20 × 55,137.72
  4. Step 4: Simplify right side
    100,459.44x = 7,643,973,702.02
  5. Step 5: Solve for x
    x = 7,643,973,702.02/100,459.44
  6. Step 6: Final answer
    x = 76,090.15

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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.