Home / 138,419.12-207,628.68-38,579.60

Finding the Fourth Proportional to 138,419.12, 207,628.68 and 38,579.60

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Solution

The fourth proportional to 138,419.12, 207,628.68 and 38,579.60 is: 57,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,419.12 : 207,628.68 = 38,579.60 : x
  2. Step 2: Convert to fraction form
    138,419.12/207,628.68 = 38,579.60/x
  3. Step 3: Cross multiply
    138,419.12x = 207,628.68 × 38,579.60
  4. Step 4: Simplify right side
    138,419.12x = 8,010,231,422.93
  5. Step 5: Solve for x
    x = 8,010,231,422.93/138,419.12
  6. Step 6: Final answer
    x = 57,869.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.