Home / 136,817.20-188,805.89-76,388.77

Finding the Fourth Proportional to 136,817.20, 188,805.89 and 76,388.77

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Solution

The fourth proportional to 136,817.20, 188,805.89 and 76,388.77 is: 105,415.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,817.20 : 188,805.89 = 76,388.77 : x
  2. Step 2: Convert to fraction form
    136,817.20/188,805.89 = 76,388.77/x
  3. Step 3: Cross multiply
    136,817.20x = 188,805.89 × 76,388.77
  4. Step 4: Simplify right side
    136,817.20x = 14,422,649,070.80
  5. Step 5: Solve for x
    x = 14,422,649,070.80/136,817.20
  6. Step 6: Final answer
    x = 105,415.47

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1.5x scale

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.