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Finding the Fourth Proportional to 208,244.40, 311,929.20 and 114,640.80

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Solution

The fourth proportional to 208,244.40, 311,929.20 and 114,640.80 is: 171,720.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,244.40 : 311,929.20 = 114,640.80 : x
  2. Step 2: Convert to fraction form
    208,244.40/311,929.20 = 114,640.80/x
  3. Step 3: Cross multiply
    208,244.40x = 311,929.20 × 114,640.80
  4. Step 4: Simplify right side
    208,244.40x = 35,759,813,031.36
  5. Step 5: Solve for x
    x = 35,759,813,031.36/208,244.40
  6. Step 6: Final answer
    x = 171,720.41

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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.