Home / 91,319.36-136,989.96-38,722

Finding the Fourth Proportional to 91,319.36, 136,989.96 and 38,722

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Solution

The fourth proportional to 91,319.36, 136,989.96 and 38,722 is: 58,087.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,319.36 : 136,989.96 = 38,722 : x
  2. Step 2: Convert to fraction form
    91,319.36/136,989.96 = 38,722/x
  3. Step 3: Cross multiply
    91,319.36x = 136,989.96 × 38,722
  4. Step 4: Simplify right side
    91,319.36x = 5,304,525,231.12
  5. Step 5: Solve for x
    x = 5,304,525,231.12/91,319.36
  6. Step 6: Final answer
    x = 58,087.63

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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.