Home / 149,775.12-206,681.94-81,778.97

Finding the Fourth Proportional to 149,775.12, 206,681.94 and 81,778.97

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Solution

The fourth proportional to 149,775.12, 206,681.94 and 81,778.97 is: 112,850.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,775.12 : 206,681.94 = 81,778.97 : x
  2. Step 2: Convert to fraction form
    149,775.12/206,681.94 = 81,778.97/x
  3. Step 3: Cross multiply
    149,775.12x = 206,681.94 × 81,778.97
  4. Step 4: Simplify right side
    149,775.12x = 16,902,235,137.39
  5. Step 5: Solve for x
    x = 16,902,235,137.39/149,775.12
  6. Step 6: Final answer
    x = 112,850.75

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1.5x scale

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.