Home / 91,720.16-136,952.56-82,170.96

Finding the Fourth Proportional to 91,720.16, 136,952.56 and 82,170.96

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Solution

The fourth proportional to 91,720.16, 136,952.56 and 82,170.96 is: 122,694.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720.16 : 136,952.56 = 82,170.96 : x
  2. Step 2: Convert to fraction form
    91,720.16/136,952.56 = 82,170.96/x
  3. Step 3: Cross multiply
    91,720.16x = 136,952.56 × 82,170.96
  4. Step 4: Simplify right side
    91,720.16x = 11,253,523,329.66
  5. Step 5: Solve for x
    x = 11,253,523,329.66/91,720.16
  6. Step 6: Final answer
    x = 122,694.11

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.