Home / 138,716.49-207,987.25-76,430.73

Finding the Fourth Proportional to 138,716.49, 207,987.25 and 76,430.73

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Solution

The fourth proportional to 138,716.49, 207,987.25 and 76,430.73 is: 114,597.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,716.49 : 207,987.25 = 76,430.73 : x
  2. Step 2: Convert to fraction form
    138,716.49/207,987.25 = 76,430.73/x
  3. Step 3: Cross multiply
    138,716.49x = 207,987.25 × 76,430.73
  4. Step 4: Simplify right side
    138,716.49x = 15,896,617,348.19
  5. Step 5: Solve for x
    x = 15,896,617,348.19/138,716.49
  6. Step 6: Final answer
    x = 114,597.89

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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.