Home / 138,654.12-207,986.39-38,811.75

Finding the Fourth Proportional to 138,654.12, 207,986.39 and 38,811.75

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Solution

The fourth proportional to 138,654.12, 207,986.39 and 38,811.75 is: 58,219.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,654.12 : 207,986.39 = 38,811.75 : x
  2. Step 2: Convert to fraction form
    138,654.12/207,986.39 = 38,811.75/x
  3. Step 3: Cross multiply
    138,654.12x = 207,986.39 × 38,811.75
  4. Step 4: Simplify right side
    138,654.12x = 8,072,315,869.11
  5. Step 5: Solve for x
    x = 8,072,315,869.11/138,654.12
  6. Step 6: Final answer
    x = 58,219.08

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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.