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Finding the Fourth Proportional to 148,885.20, 205,479.32 and 85,243.44

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Solution

The fourth proportional to 148,885.20, 205,479.32 and 85,243.44 is: 117,646.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,885.20 : 205,479.32 = 85,243.44 : x
  2. Step 2: Convert to fraction form
    148,885.20/205,479.32 = 85,243.44/x
  3. Step 3: Cross multiply
    148,885.20x = 205,479.32 × 85,243.44
  4. Step 4: Simplify right side
    148,885.20x = 17,515,764,085.66
  5. Step 5: Solve for x
    x = 17,515,764,085.66/148,885.20
  6. Step 6: Final answer
    x = 117,646.11

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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.