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Finding the Fourth Proportional to 74,539.98, 102,872.45 and 55,644.30

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Solution

The fourth proportional to 74,539.98, 102,872.45 and 55,644.30 is: 76,794.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,539.98 : 102,872.45 = 55,644.30 : x
  2. Step 2: Convert to fraction form
    74,539.98/102,872.45 = 55,644.30/x
  3. Step 3: Cross multiply
    74,539.98x = 102,872.45 × 55,644.30
  4. Step 4: Simplify right side
    74,539.98x = 5,724,265,469.54
  5. Step 5: Solve for x
    x = 5,724,265,469.54/74,539.98
  6. Step 6: Final answer
    x = 76,794.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.