Home / 91,741.40-137,612.10-82,118.60

Finding the Fourth Proportional to 91,741.40, 137,612.10 and 82,118.60

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Solution

The fourth proportional to 91,741.40, 137,612.10 and 82,118.60 is: 123,177.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,741.40 : 137,612.10 = 82,118.60 : x
  2. Step 2: Convert to fraction form
    91,741.40/137,612.10 = 82,118.60/x
  3. Step 3: Cross multiply
    91,741.40x = 137,612.10 × 82,118.60
  4. Step 4: Simplify right side
    91,741.40x = 11,300,512,995.06
  5. Step 5: Solve for x
    x = 11,300,512,995.06/91,741.40
  6. Step 6: Final answer
    x = 123,177.90

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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.