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Finding the Fourth Proportional to 68,365.62, 102,400.80 and 66,692.57

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Solution

The fourth proportional to 68,365.62, 102,400.80 and 66,692.57 is: 99,894.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,365.62 : 102,400.80 = 66,692.57 : x
  2. Step 2: Convert to fraction form
    68,365.62/102,400.80 = 66,692.57/x
  3. Step 3: Cross multiply
    68,365.62x = 102,400.80 × 66,692.57
  4. Step 4: Simplify right side
    68,365.62x = 6,829,372,522.06
  5. Step 5: Solve for x
    x = 6,829,372,522.06/68,365.62
  6. Step 6: Final answer
    x = 99,894.84

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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.