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Finding the Fourth Proportional to 108,647.80, 162,777.30 and 91,929.40

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Solution

The fourth proportional to 108,647.80, 162,777.30 and 91,929.40 is: 137,729.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,647.80 : 162,777.30 = 91,929.40 : x
  2. Step 2: Convert to fraction form
    108,647.80/162,777.30 = 91,929.40/x
  3. Step 3: Cross multiply
    108,647.80x = 162,777.30 × 91,929.40
  4. Step 4: Simplify right side
    108,647.80x = 14,964,019,522.62
  5. Step 5: Solve for x
    x = 14,964,019,522.62/108,647.80
  6. Step 6: Final answer
    x = 137,729.61

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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.