Home / 100,335.76-138,464.52-57,321.04

Finding the Fourth Proportional to 100,335.76, 138,464.52 and 57,321.04

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Solution

The fourth proportional to 100,335.76, 138,464.52 and 57,321.04 is: 79,103.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,335.76 : 138,464.52 = 57,321.04 : x
  2. Step 2: Convert to fraction form
    100,335.76/138,464.52 = 57,321.04/x
  3. Step 3: Cross multiply
    100,335.76x = 138,464.52 × 57,321.04
  4. Step 4: Simplify right side
    100,335.76x = 7,936,930,289.50
  5. Step 5: Solve for x
    x = 7,936,930,289.50/100,335.76
  6. Step 6: Final answer
    x = 79,103.70

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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.