Home / 91,112.80-136,669.20-82,255.45

Finding the Fourth Proportional to 91,112.80, 136,669.20 and 82,255.45

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Solution

The fourth proportional to 91,112.80, 136,669.20 and 82,255.45 is: 123,383.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,112.80 : 136,669.20 = 82,255.45 : x
  2. Step 2: Convert to fraction form
    91,112.80/136,669.20 = 82,255.45/x
  3. Step 3: Cross multiply
    91,112.80x = 136,669.20 × 82,255.45
  4. Step 4: Simplify right side
    91,112.80x = 11,241,786,547.14
  5. Step 5: Solve for x
    x = 11,241,786,547.14/91,112.80
  6. Step 6: Final answer
    x = 123,383.18

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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.