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Finding the Fourth Proportional to 268,335.70, 402,517.32 and 68,657.80

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Solution

The fourth proportional to 268,335.70, 402,517.32 and 68,657.80 is: 102,990.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,335.70 : 402,517.32 = 68,657.80 : x
  2. Step 2: Convert to fraction form
    268,335.70/402,517.32 = 68,657.80/x
  3. Step 3: Cross multiply
    268,335.70x = 402,517.32 × 68,657.80
  4. Step 4: Simplify right side
    268,335.70x = 27,635,953,653.10
  5. Step 5: Solve for x
    x = 27,635,953,653.10/268,335.70
  6. Step 6: Final answer
    x = 102,990.22

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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.