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Finding the Fourth Proportional to 108,234.40, 162,351.60 and 81,990.40

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Solution

The fourth proportional to 108,234.40, 162,351.60 and 81,990.40 is: 122,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,234.40 : 162,351.60 = 81,990.40 : x
  2. Step 2: Convert to fraction form
    108,234.40/162,351.60 = 81,990.40/x
  3. Step 3: Cross multiply
    108,234.40x = 162,351.60 × 81,990.40
  4. Step 4: Simplify right side
    108,234.40x = 13,311,272,624.64
  5. Step 5: Solve for x
    x = 13,311,272,624.64/108,234.40
  6. Step 6: Final answer
    x = 122,985.60

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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.