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Finding the Fourth Proportional to 262,503.90, 393,804.45 and 85,016.70

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Solution

The fourth proportional to 262,503.90, 393,804.45 and 85,016.70 is: 127,540.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,503.90 : 393,804.45 = 85,016.70 : x
  2. Step 2: Convert to fraction form
    262,503.90/393,804.45 = 85,016.70/x
  3. Step 3: Cross multiply
    262,503.90x = 393,804.45 × 85,016.70
  4. Step 4: Simplify right side
    262,503.90x = 33,479,954,784.32
  5. Step 5: Solve for x
    x = 33,479,954,784.32/262,503.90
  6. Step 6: Final answer
    x = 127,540.79

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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.