Home / 126,901.76-190,438.78-67,779.88

Finding the Fourth Proportional to 126,901.76, 190,438.78 and 67,779.88

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Solution

The fourth proportional to 126,901.76, 190,438.78 and 67,779.88 is: 101,715.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,901.76 : 190,438.78 = 67,779.88 : x
  2. Step 2: Convert to fraction form
    126,901.76/190,438.78 = 67,779.88/x
  3. Step 3: Cross multiply
    126,901.76x = 190,438.78 × 67,779.88
  4. Step 4: Simplify right side
    126,901.76x = 12,907,917,655.75
  5. Step 5: Solve for x
    x = 12,907,917,655.75/126,901.76
  6. Step 6: Final answer
    x = 101,715.83

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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.