Home / 91,399.28-137,059.70-31,433.79

Finding the Fourth Proportional to 91,399.28, 137,059.70 and 31,433.79

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Solution

The fourth proportional to 91,399.28, 137,059.70 and 31,433.79 is: 47,137.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,399.28 : 137,059.70 = 31,433.79 : x
  2. Step 2: Convert to fraction form
    91,399.28/137,059.70 = 31,433.79/x
  3. Step 3: Cross multiply
    91,399.28x = 137,059.70 × 31,433.79
  4. Step 4: Simplify right side
    91,399.28x = 4,308,305,827.26
  5. Step 5: Solve for x
    x = 4,308,305,827.26/91,399.28
  6. Step 6: Final answer
    x = 47,137.20

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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.