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Finding the Fourth Proportional to 201,680.20, 302,520.30 and 61,420.60

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Solution

The fourth proportional to 201,680.20, 302,520.30 and 61,420.60 is: 92,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,680.20 : 302,520.30 = 61,420.60 : x
  2. Step 2: Convert to fraction form
    201,680.20/302,520.30 = 61,420.60/x
  3. Step 3: Cross multiply
    201,680.20x = 302,520.30 × 61,420.60
  4. Step 4: Simplify right side
    201,680.20x = 18,580,978,338.18
  5. Step 5: Solve for x
    x = 18,580,978,338.18/201,680.20
  6. Step 6: Final answer
    x = 92,130.90

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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.