Home / 138,742.58-191,464.76-75,080.37

Finding the Fourth Proportional to 138,742.58, 191,464.76 and 75,080.37

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Solution

The fourth proportional to 138,742.58, 191,464.76 and 75,080.37 is: 103,610.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.58 : 191,464.76 = 75,080.37 : x
  2. Step 2: Convert to fraction form
    138,742.58/191,464.76 = 75,080.37/x
  3. Step 3: Cross multiply
    138,742.58x = 191,464.76 × 75,080.37
  4. Step 4: Simplify right side
    138,742.58x = 14,375,245,400.55
  5. Step 5: Solve for x
    x = 14,375,245,400.55/138,742.58
  6. Step 6: Final answer
    x = 103,610.92

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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.