Home / 91,789.51-137,589.54-38,512.43

Finding the Fourth Proportional to 91,789.51, 137,589.54 and 38,512.43

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Solution

The fourth proportional to 91,789.51, 137,589.54 and 38,512.43 is: 57,728.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,789.51 : 137,589.54 = 38,512.43 : x
  2. Step 2: Convert to fraction form
    91,789.51/137,589.54 = 38,512.43/x
  3. Step 3: Cross multiply
    91,789.51x = 137,589.54 × 38,512.43
  4. Step 4: Simplify right side
    91,789.51x = 5,298,907,428.21
  5. Step 5: Solve for x
    x = 5,298,907,428.21/91,789.51
  6. Step 6: Final answer
    x = 57,728.90

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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.