Home / 100,161.45-138,217.55-54,830.75

Finding the Fourth Proportional to 100,161.45, 138,217.55 and 54,830.75

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Solution

The fourth proportional to 100,161.45, 138,217.55 and 54,830.75 is: 75,663.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,161.45 : 138,217.55 = 54,830.75 : x
  2. Step 2: Convert to fraction form
    100,161.45/138,217.55 = 54,830.75/x
  3. Step 3: Cross multiply
    100,161.45x = 138,217.55 × 54,830.75
  4. Step 4: Simplify right side
    100,161.45x = 7,578,571,929.66
  5. Step 5: Solve for x
    x = 7,578,571,929.66/100,161.45
  6. Step 6: Final answer
    x = 75,663.56

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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.