Home / 100,222.20-138,308.87-57,200.83

Finding the Fourth Proportional to 100,222.20, 138,308.87 and 57,200.83

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Solution

The fourth proportional to 100,222.20, 138,308.87 and 57,200.83 is: 78,938.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,222.20 : 138,308.87 = 57,200.83 : x
  2. Step 2: Convert to fraction form
    100,222.20/138,308.87 = 57,200.83/x
  3. Step 3: Cross multiply
    100,222.20x = 138,308.87 × 57,200.83
  4. Step 4: Simplify right side
    100,222.20x = 7,911,382,160.36
  5. Step 5: Solve for x
    x = 7,911,382,160.36/100,222.20
  6. Step 6: Final answer
    x = 78,938.42

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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.