Home / 126,187.50-188,836.90-78,824.88

Finding the Fourth Proportional to 126,187.50, 188,836.90 and 78,824.88

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Solution

The fourth proportional to 126,187.50, 188,836.90 and 78,824.88 is: 117,959.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,187.50 : 188,836.90 = 78,824.88 : x
  2. Step 2: Convert to fraction form
    126,187.50/188,836.90 = 78,824.88/x
  3. Step 3: Cross multiply
    126,187.50x = 188,836.90 × 78,824.88
  4. Step 4: Simplify right side
    126,187.50x = 14,885,045,982.07
  5. Step 5: Solve for x
    x = 14,885,045,982.07/126,187.50
  6. Step 6: Final answer
    x = 117,959.75

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1.5x scale

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.