Home / 81,261.45-121,861.87-27,938.34

Finding the Fourth Proportional to 81,261.45, 121,861.87 and 27,938.34

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Solution

The fourth proportional to 81,261.45, 121,861.87 and 27,938.34 is: 41,897.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,261.45 : 121,861.87 = 27,938.34 : x
  2. Step 2: Convert to fraction form
    81,261.45/121,861.87 = 27,938.34/x
  3. Step 3: Cross multiply
    81,261.45x = 121,861.87 × 27,938.34
  4. Step 4: Simplify right side
    81,261.45x = 3,404,617,858.83
  5. Step 5: Solve for x
    x = 3,404,617,858.83/81,261.45
  6. Step 6: Final answer
    x = 41,897.08

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1.5x scale

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.