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Finding the Fourth Proportional to 108,305.80, 162,401.10 and 45,905.80

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Solution

The fourth proportional to 108,305.80, 162,401.10 and 45,905.80 is: 68,834.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,305.80 : 162,401.10 = 45,905.80 : x
  2. Step 2: Convert to fraction form
    108,305.80/162,401.10 = 45,905.80/x
  3. Step 3: Cross multiply
    108,305.80x = 162,401.10 × 45,905.80
  4. Step 4: Simplify right side
    108,305.80x = 7,455,152,416.38
  5. Step 5: Solve for x
    x = 7,455,152,416.38/108,305.80
  6. Step 6: Final answer
    x = 68,834.29

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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.