Home / 149,961.06-206,946.14-81,978.30

Finding the Fourth Proportional to 149,961.06, 206,946.14 and 81,978.30

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Solution

The fourth proportional to 149,961.06, 206,946.14 and 81,978.30 is: 113,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,961.06 : 206,946.14 = 81,978.30 : x
  2. Step 2: Convert to fraction form
    149,961.06/206,946.14 = 81,978.30/x
  3. Step 3: Cross multiply
    149,961.06x = 206,946.14 × 81,978.30
  4. Step 4: Simplify right side
    149,961.06x = 16,965,092,338.87
  5. Step 5: Solve for x
    x = 16,965,092,338.87/149,961.06
  6. Step 6: Final answer
    x = 113,129.98

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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.