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Finding the Fourth Proportional to 68,675.20, 102,915.60 and 42,301.60

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Solution

The fourth proportional to 68,675.20, 102,915.60 and 42,301.60 is: 63,392.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,675.20 : 102,915.60 = 42,301.60 : x
  2. Step 2: Convert to fraction form
    68,675.20/102,915.60 = 42,301.60/x
  3. Step 3: Cross multiply
    68,675.20x = 102,915.60 × 42,301.60
  4. Step 4: Simplify right side
    68,675.20x = 4,353,494,544.96
  5. Step 5: Solve for x
    x = 4,353,494,544.96/68,675.20
  6. Step 6: Final answer
    x = 63,392.53

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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.