Home / 126,106.40-188,929.20-76,800.80

Finding the Fourth Proportional to 126,106.40, 188,929.20 and 76,800.80

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Solution

The fourth proportional to 126,106.40, 188,929.20 and 76,800.80 is: 115,060.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,106.40 : 188,929.20 = 76,800.80 : x
  2. Step 2: Convert to fraction form
    126,106.40/188,929.20 = 76,800.80/x
  3. Step 3: Cross multiply
    126,106.40x = 188,929.20 × 76,800.80
  4. Step 4: Simplify right side
    126,106.40x = 14,509,913,703.36
  5. Step 5: Solve for x
    x = 14,509,913,703.36/126,106.40
  6. Step 6: Final answer
    x = 115,060.88

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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.