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Finding the Fourth Proportional to 68,793.90, 103,190.85 and 45,174.30

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Solution

The fourth proportional to 68,793.90, 103,190.85 and 45,174.30 is: 67,761.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,793.90 : 103,190.85 = 45,174.30 : x
  2. Step 2: Convert to fraction form
    68,793.90/103,190.85 = 45,174.30/x
  3. Step 3: Cross multiply
    68,793.90x = 103,190.85 × 45,174.30
  4. Step 4: Simplify right side
    68,793.90x = 4,661,574,415.16
  5. Step 5: Solve for x
    x = 4,661,574,415.16/68,793.90
  6. Step 6: Final answer
    x = 67,761.45

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1.5x scale

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.