Home / 91,268.20-136,902.30-81,245.80

Finding the Fourth Proportional to 91,268.20, 136,902.30 and 81,245.80

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Solution

The fourth proportional to 91,268.20, 136,902.30 and 81,245.80 is: 121,868.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,268.20 : 136,902.30 = 81,245.80 : x
  2. Step 2: Convert to fraction form
    91,268.20/136,902.30 = 81,245.80/x
  3. Step 3: Cross multiply
    91,268.20x = 136,902.30 × 81,245.80
  4. Step 4: Simplify right side
    91,268.20x = 11,122,736,885.34
  5. Step 5: Solve for x
    x = 11,122,736,885.34/91,268.20
  6. Step 6: Final answer
    x = 121,868.70

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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.