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Finding the Fourth Proportional to 220,247.25, 303,915.42 and 129,583.28

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Solution

The fourth proportional to 220,247.25, 303,915.42 and 129,583.28 is: 178,809.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,247.25 : 303,915.42 = 129,583.28 : x
  2. Step 2: Convert to fraction form
    220,247.25/303,915.42 = 129,583.28/x
  3. Step 3: Cross multiply
    220,247.25x = 303,915.42 × 129,583.28
  4. Step 4: Simplify right side
    220,247.25x = 39,382,355,446.60
  5. Step 5: Solve for x
    x = 39,382,355,446.60/220,247.25
  6. Step 6: Final answer
    x = 178,809.75

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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.