Home / 138,742.76-208,107.90-45,249.32

Finding the Fourth Proportional to 138,742.76, 208,107.90 and 45,249.32

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Solution

The fourth proportional to 138,742.76, 208,107.90 and 45,249.32 is: 67,871.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,742.76 : 208,107.90 = 45,249.32 : x
  2. Step 2: Convert to fraction form
    138,742.76/208,107.90 = 45,249.32/x
  3. Step 3: Cross multiply
    138,742.76x = 208,107.90 × 45,249.32
  4. Step 4: Simplify right side
    138,742.76x = 9,416,740,961.63
  5. Step 5: Solve for x
    x = 9,416,740,961.63/138,742.76
  6. Step 6: Final answer
    x = 67,871.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.