Home / 91,286.20-136,929.30-81,263.80

Finding the Fourth Proportional to 91,286.20, 136,929.30 and 81,263.80

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Solution

The fourth proportional to 91,286.20, 136,929.30 and 81,263.80 is: 121,895.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,286.20 : 136,929.30 = 81,263.80 : x
  2. Step 2: Convert to fraction form
    91,286.20/136,929.30 = 81,263.80/x
  3. Step 3: Cross multiply
    91,286.20x = 136,929.30 × 81,263.80
  4. Step 4: Simplify right side
    91,286.20x = 11,127,395,249.34
  5. Step 5: Solve for x
    x = 11,127,395,249.34/91,286.20
  6. Step 6: Final answer
    x = 121,895.70

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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.