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Finding the Fourth Proportional to 245,906.40, 368,809.20 and 68,368.80

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Solution

The fourth proportional to 245,906.40, 368,809.20 and 68,368.80 is: 102,539.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,906.40 : 368,809.20 = 68,368.80 : x
  2. Step 2: Convert to fraction form
    245,906.40/368,809.20 = 68,368.80/x
  3. Step 3: Cross multiply
    245,906.40x = 368,809.20 × 68,368.80
  4. Step 4: Simplify right side
    245,906.40x = 25,215,042,432.96
  5. Step 5: Solve for x
    x = 25,215,042,432.96/245,906.40
  6. Step 6: Final answer
    x = 102,539.19

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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.