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Finding the Fourth Proportional to 203,690.67, 281,126.93 and 118,807.76

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Solution

The fourth proportional to 203,690.67, 281,126.93 and 118,807.76 is: 163,974.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,690.67 : 281,126.93 = 118,807.76 : x
  2. Step 2: Convert to fraction form
    203,690.67/281,126.93 = 118,807.76/x
  3. Step 3: Cross multiply
    203,690.67x = 281,126.93 × 118,807.76
  4. Step 4: Simplify right side
    203,690.67x = 33,400,058,829.30
  5. Step 5: Solve for x
    x = 33,400,058,829.30/203,690.67
  6. Step 6: Final answer
    x = 163,974.42

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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.