Home / 149,122.56-205,786.08-81,140.88

Finding the Fourth Proportional to 149,122.56, 205,786.08 and 81,140.88

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Solution

The fourth proportional to 149,122.56, 205,786.08 and 81,140.88 is: 111,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,122.56 : 205,786.08 = 81,140.88 : x
  2. Step 2: Convert to fraction form
    149,122.56/205,786.08 = 81,140.88/x
  3. Step 3: Cross multiply
    149,122.56x = 205,786.08 × 81,140.88
  4. Step 4: Simplify right side
    149,122.56x = 16,697,663,622.95
  5. Step 5: Solve for x
    x = 16,697,663,622.95/149,122.56
  6. Step 6: Final answer
    x = 111,972.75

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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.