Home / 137,986.20-190,331.10-112,795.80

Finding the Fourth Proportional to 137,986.20, 190,331.10 and 112,795.80

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Solution

The fourth proportional to 137,986.20, 190,331.10 and 112,795.80 is: 155,584.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,986.20 : 190,331.10 = 112,795.80 : x
  2. Step 2: Convert to fraction form
    137,986.20/190,331.10 = 112,795.80/x
  3. Step 3: Cross multiply
    137,986.20x = 190,331.10 × 112,795.80
  4. Step 4: Simplify right side
    137,986.20x = 21,468,548,689.38
  5. Step 5: Solve for x
    x = 21,468,548,689.38/137,986.20
  6. Step 6: Final answer
    x = 155,584.75

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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.