Home / 100,650.18-138,917.36-76,734.12

Finding the Fourth Proportional to 100,650.18, 138,917.36 and 76,734.12

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Solution

The fourth proportional to 100,650.18, 138,917.36 and 76,734.12 is: 105,908.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,650.18 : 138,917.36 = 76,734.12 : x
  2. Step 2: Convert to fraction form
    100,650.18/138,917.36 = 76,734.12/x
  3. Step 3: Cross multiply
    100,650.18x = 138,917.36 × 76,734.12
  4. Step 4: Simplify right side
    100,650.18x = 10,659,701,372.32
  5. Step 5: Solve for x
    x = 10,659,701,372.32/100,650.18
  6. Step 6: Final answer
    x = 105,908.42

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1.5x scale

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.