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Finding the Fourth Proportional to 68,398.40, 102,511.20 and 49,908.80

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Solution

The fourth proportional to 68,398.40, 102,511.20 and 49,908.80 is: 74,800.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,398.40 : 102,511.20 = 49,908.80 : x
  2. Step 2: Convert to fraction form
    68,398.40/102,511.20 = 49,908.80/x
  3. Step 3: Cross multiply
    68,398.40x = 102,511.20 × 49,908.80
  4. Step 4: Simplify right side
    68,398.40x = 5,116,210,978.56
  5. Step 5: Solve for x
    x = 5,116,210,978.56/68,398.40
  6. Step 6: Final answer
    x = 74,800.16

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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.