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Finding the Fourth Proportional to 68,272.80, 102,409.20 and 65,551.20

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Solution

The fourth proportional to 68,272.80, 102,409.20 and 65,551.20 is: 98,326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,272.80 : 102,409.20 = 65,551.20 : x
  2. Step 2: Convert to fraction form
    68,272.80/102,409.20 = 65,551.20/x
  3. Step 3: Cross multiply
    68,272.80x = 102,409.20 × 65,551.20
  4. Step 4: Simplify right side
    68,272.80x = 6,713,045,951.04
  5. Step 5: Solve for x
    x = 6,713,045,951.04/68,272.80
  6. Step 6: Final answer
    x = 98,326.80

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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.