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Finding the Fourth Proportional to 218,910.60, 328,392.83 and 74,840.15

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Solution

The fourth proportional to 218,910.60, 328,392.83 and 74,840.15 is: 112,269.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,910.60 : 328,392.83 = 74,840.15 : x
  2. Step 2: Convert to fraction form
    218,910.60/328,392.83 = 74,840.15/x
  3. Step 3: Cross multiply
    218,910.60x = 328,392.83 × 74,840.15
  4. Step 4: Simplify right side
    218,910.60x = 24,576,969,664.21
  5. Step 5: Solve for x
    x = 24,576,969,664.21/218,910.60
  6. Step 6: Final answer
    x = 112,269.44

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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.