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Finding the Fourth Proportional to 68,127.90, 102,204.06 and 28,146.90

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Solution

The fourth proportional to 68,127.90, 102,204.06 and 28,146.90 is: 42,225.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,127.90 : 102,204.06 = 28,146.90 : x
  2. Step 2: Convert to fraction form
    68,127.90/102,204.06 = 28,146.90/x
  3. Step 3: Cross multiply
    68,127.90x = 102,204.06 × 28,146.90
  4. Step 4: Simplify right side
    68,127.90x = 2,876,727,456.41
  5. Step 5: Solve for x
    x = 2,876,727,456.41/68,127.90
  6. Step 6: Final answer
    x = 42,225.39

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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.