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Finding the Fourth Proportional to 68,404.20, 102,605.20 and 56,692.68

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Solution

The fourth proportional to 68,404.20, 102,605.20 and 56,692.68 is: 85,038.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,404.20 : 102,605.20 = 56,692.68 : x
  2. Step 2: Convert to fraction form
    68,404.20/102,605.20 = 56,692.68/x
  3. Step 3: Cross multiply
    68,404.20x = 102,605.20 × 56,692.68
  4. Step 4: Simplify right side
    68,404.20x = 5,816,963,769.94
  5. Step 5: Solve for x
    x = 5,816,963,769.94/68,404.20
  6. Step 6: Final answer
    x = 85,038.11

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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.