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Finding the Fourth Proportional to 68,424.80, 102,622.80 and 28,983.20

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Solution

The fourth proportional to 68,424.80, 102,622.80 and 28,983.20 is: 43,468.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,424.80 : 102,622.80 = 28,983.20 : x
  2. Step 2: Convert to fraction form
    68,424.80/102,622.80 = 28,983.20/x
  3. Step 3: Cross multiply
    68,424.80x = 102,622.80 × 28,983.20
  4. Step 4: Simplify right side
    68,424.80x = 2,974,337,136.96
  5. Step 5: Solve for x
    x = 2,974,337,136.96/68,424.80
  6. Step 6: Final answer
    x = 43,468.70

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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.