Home / 100,221.73-138,308.22-57,200.36

Finding the Fourth Proportional to 100,221.73, 138,308.22 and 57,200.36

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Solution

The fourth proportional to 100,221.73, 138,308.22 and 57,200.36 is: 78,937.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,221.73 : 138,308.22 = 57,200.36 : x
  2. Step 2: Convert to fraction form
    100,221.73/138,308.22 = 57,200.36/x
  3. Step 3: Cross multiply
    100,221.73x = 138,308.22 × 57,200.36
  4. Step 4: Simplify right side
    100,221.73x = 7,911,279,283.42
  5. Step 5: Solve for x
    x = 7,911,279,283.42/100,221.73
  6. Step 6: Final answer
    x = 78,937.77

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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.