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Finding the Fourth Proportional to 108,722.25, 163,193.94 and 74,990.61

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Solution

The fourth proportional to 108,722.25, 163,193.94 and 74,990.61 is: 112,562.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,722.25 : 163,193.94 = 74,990.61 : x
  2. Step 2: Convert to fraction form
    108,722.25/163,193.94 = 74,990.61/x
  3. Step 3: Cross multiply
    108,722.25x = 163,193.94 × 74,990.61
  4. Step 4: Simplify right side
    108,722.25x = 12,238,013,108.90
  5. Step 5: Solve for x
    x = 12,238,013,108.90/108,722.25
  6. Step 6: Final answer
    x = 112,562.18

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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.