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Finding the Fourth Proportional to 203,679.90, 281,013.75 and 118,780.38

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Solution

The fourth proportional to 203,679.90, 281,013.75 and 118,780.38 is: 163,879.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,679.90 : 281,013.75 = 118,780.38 : x
  2. Step 2: Convert to fraction form
    203,679.90/281,013.75 = 118,780.38/x
  3. Step 3: Cross multiply
    203,679.90x = 281,013.75 × 118,780.38
  4. Step 4: Simplify right side
    203,679.90x = 33,378,920,010.23
  5. Step 5: Solve for x
    x = 33,378,920,010.23/203,679.90
  6. Step 6: Final answer
    x = 163,879.30

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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.