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Finding the Fourth Proportional to 208,403.88, 312,644.22 and 68,170.28

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Solution

The fourth proportional to 208,403.88, 312,644.22 and 68,170.28 is: 102,267.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,403.88 : 312,644.22 = 68,170.28 : x
  2. Step 2: Convert to fraction form
    208,403.88/312,644.22 = 68,170.28/x
  3. Step 3: Cross multiply
    208,403.88x = 312,644.22 × 68,170.28
  4. Step 4: Simplify right side
    208,403.88x = 21,313,044,017.78
  5. Step 5: Solve for x
    x = 21,313,044,017.78/208,403.88
  6. Step 6: Final answer
    x = 102,267.98

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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.