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Finding the Fourth Proportional to 109,679.70, 151,361.09 and 61,940.22

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Solution

The fourth proportional to 109,679.70, 151,361.09 and 61,940.22 is: 85,479.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,679.70 : 151,361.09 = 61,940.22 : x
  2. Step 2: Convert to fraction form
    109,679.70/151,361.09 = 61,940.22/x
  3. Step 3: Cross multiply
    109,679.70x = 151,361.09 × 61,940.22
  4. Step 4: Simplify right side
    109,679.70x = 9,375,338,904.34
  5. Step 5: Solve for x
    x = 9,375,338,904.34/109,679.70
  6. Step 6: Final answer
    x = 85,479.25

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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.