Home / 91,431.96-137,112.49-31,449.03

Finding the Fourth Proportional to 91,431.96, 137,112.49 and 31,449.03

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Solution

The fourth proportional to 91,431.96, 137,112.49 and 31,449.03 is: 47,161.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,431.96 : 137,112.49 = 31,449.03 : x
  2. Step 2: Convert to fraction form
    91,431.96/137,112.49 = 31,449.03/x
  3. Step 3: Cross multiply
    91,431.96x = 137,112.49 × 31,449.03
  4. Step 4: Simplify right side
    91,431.96x = 4,312,054,811.38
  5. Step 5: Solve for x
    x = 4,312,054,811.38/91,431.96
  6. Step 6: Final answer
    x = 47,161.35

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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.