Home / 91,628.11-137,408.40-31,641.33

Finding the Fourth Proportional to 91,628.11, 137,408.40 and 31,641.33

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Solution

The fourth proportional to 91,628.11, 137,408.40 and 31,641.33 is: 47,450.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,628.11 : 137,408.40 = 31,641.33 : x
  2. Step 2: Convert to fraction form
    91,628.11/137,408.40 = 31,641.33/x
  3. Step 3: Cross multiply
    91,628.11x = 137,408.40 × 31,641.33
  4. Step 4: Simplify right side
    91,628.11x = 4,347,785,044.45
  5. Step 5: Solve for x
    x = 4,347,785,044.45/91,628.11
  6. Step 6: Final answer
    x = 47,450.34

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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.