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Finding the Fourth Proportional to 68,550, 102,840.12 and 29,140.80

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Solution

The fourth proportional to 68,550, 102,840.12 and 29,140.80 is: 43,717.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,550 : 102,840.12 = 29,140.80 : x
  2. Step 2: Convert to fraction form
    68,550/102,840.12 = 29,140.80/x
  3. Step 3: Cross multiply
    68,550x = 102,840.12 × 29,140.80
  4. Step 4: Simplify right side
    68,550x = 2,996,843,368.90
  5. Step 5: Solve for x
    x = 2,996,843,368.90/68,550
  6. Step 6: Final answer
    x = 43,717.63

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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.