Home / 138,040.69-207,109.63-67,969.21

Finding the Fourth Proportional to 138,040.69, 207,109.63 and 67,969.21

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Solution

The fourth proportional to 138,040.69, 207,109.63 and 67,969.21 is: 101,977.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,040.69 : 207,109.63 = 67,969.21 : x
  2. Step 2: Convert to fraction form
    138,040.69/207,109.63 = 67,969.21/x
  3. Step 3: Cross multiply
    138,040.69x = 207,109.63 × 67,969.21
  4. Step 4: Simplify right side
    138,040.69x = 14,077,077,934.49
  5. Step 5: Solve for x
    x = 14,077,077,934.49/138,040.69
  6. Step 6: Final answer
    x = 101,977.74

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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.