Home / 136,619.90-188,535.09-76,190.61

Finding the Fourth Proportional to 136,619.90, 188,535.09 and 76,190.61

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Solution

The fourth proportional to 136,619.90, 188,535.09 and 76,190.61 is: 105,142.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,619.90 : 188,535.09 = 76,190.61 : x
  2. Step 2: Convert to fraction form
    136,619.90/188,535.09 = 76,190.61/x
  3. Step 3: Cross multiply
    136,619.90x = 188,535.09 × 76,190.61
  4. Step 4: Simplify right side
    136,619.90x = 14,364,603,513.50
  5. Step 5: Solve for x
    x = 14,364,603,513.50/136,619.90
  6. Step 6: Final answer
    x = 105,142.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.